About Legend Travel

  • Careers
  • Collaborate as a Blogger
  • Contact Us
  • About Us
  • Philosophy of Founder

Partnership

  • Partner With Us
  • Join Our Network
  • Affiliate Partnership
  • Influencer Program
  • Agent Marketplace

Corporate/Membership

  • Press Room
  • Apply for Membership
  • LegendLens Connect
  • Sponsor Our Story
  • Backlinks Exchange
  • Corporate Discount

Guide

  • Feature in Our Guide
  • Booking Process
  • How to Book
  • Visa Navigator Hub

Travel discounts up to 60% off sent straight to your inbox

Follow us on social for updates & special offers

Customer Support

  • +84 988 548 661
  • info@legendtravelgroup.com

Payment Channels

Supported payment methods

© 2025 Legend Travel Group. All Rights Reserved

  • FAQs
  • Privacy
  • Terms & Conditions
  • English
  • VietNam
legend travel group
  • Log in
  • Sign Up
  • Manage Bookings
  • Destination
    Asia
    • Vietnam
    • Cambodia
    • Thailand
    • Laos
    • Indonesia
  • Adventure Styles
    Active
    Bicycle
    Educational
    Explorer
    Festival & Events
    Food & Culinary
    Health, Spa & Wellness
    Hiking & Trekking
    In-depth Cultural
    Northern Lights
    Overland Truck
    Polar
    River Cruise
    Safari
    Sailing
  • Guides
    Top Destination
    • Asia
    See all countries
    Travel type
    • Where to Stay
    • What to Eat
    • Why to Go
    • How to Get there
    • Things to Do
    • When to Travel
    See all travel type
  • About
  • Contact
  • Log In
  • Sign Up
  • FAQs
  • Privacy
  • Terms & Conditions
  1. Home
  2. Asia
  3. Vietnam
  4. Vinh Long Travel Guide: 10 Best Things to Do in the Mekong Delta

Vinh Long Travel Guide: 10 Best Things to Do in the Mekong Delta

  • Share
  • Tweet
Sign Up to see what your friends like.
Contents
  1. Why Visit Vinh Long?
  2. Why Choose Legend Travel Group?
  3. 10 Best Things to Do in Vinh Long
  4. Best Time to Visit Vinh Long
  5. Getting to Vinh Long
  6. Getting Around Vinh Long
  7. What to Pack for Vinh Long
  8. Costs and Budget Planning
  9. Practical Tips for Vinh Long Activities
  10. Legend Travel Group’s Eco-Friendly Tours in Vinh Long
  11. Conclusion

Overview

Discover the 10 best things to do in Vinh Long, from Tra On Floating Market cruises to An Binh Island cycling. Book eco-friendly tours with Legend Travel Group for an authentic Mekong Delta adventure

Dive into the verdant charm of Vinh Long TravelDive into the verdant charm of Vinh Long Travel

Why Visit Vinh Long?

Capture the lively essence of Vinh Long’s riverine gemCapture the lively essence of Vinh Long’s riverine gem (Source: Internet)

A Cultural and Natural Gem in the Mekong Delta

Vinh Long, the vibrant heart of Vinh Long Province, is a cultural and culinary treasure in the Mekong Delta, nestled between the Tien and Hau Rivers with a 65 km East Sea coastline. Following Vietnam’s administrative reform, Vinh Long Province now includes Tra Vinh and Ben Tre wards, blending Kinh, Khmer (25% of 1.5 million residents), and Hoa traditions. Attracting 15,000 travelers annually, Vinh Long offers a rich tapestry of activities, from floating markets to fruit orchards and cultural performances, with costs ranging from $5–$40 (125,000–1,000,000 VND) in a tropical monsoon climate (dry season: November–April, 24–32°C or 75.2–89.6°F; rainy season: May–October, 26–36°C or 78.8–96.8°F). Its fertile, alluvial soil supports lush orchards, making it a haven for eco-tourism and cultural exploration.

Legend Travel Group, a sustainable tourism leader since 2008, offers eco-friendly tours to Vinh Long’s top attractions, using bicycles and electric boats to immerse travelers in local culture while minimizing environmental impact. Contact us at WhatsApp: +84825862222 or email: sales@legendtravelgroup.com to book your adventure.

Administrative Note

Use “Vinh Long, Vinh Long Province” for navigation. As the Mekong Delta’s hub, Vinh Long is ideal for travelers seeking authentic experiences through its vibrant waterways and cultural landmarks.

Why Choose Legend Travel Group?

Experience Vinh Long Tours with sustainable adventuresExperience Vinh Long Tours with sustainable adventures (Source: Internet)

With 17 years of expertise, Legend Travel Group serves 15,000 travelers yearly across Vietnam, Cambodia, Laos, Thailand, and Myanmar, prioritizing sustainable tourism. Our Vinh Long tours feature eco-friendly transport, English-speaking guides sharing local insights, and partnerships with community-based providers to preserve Mekong Delta traditions. Enjoy transparent pricing, free cancellations up to 48 hours prior, and 24/7 support. Book through this guide for an immersive, responsible journey aligned with Vietnam’s green tourism vision.

10 Best Things to Do in Vinh Long

Learn Vinh Long’s heritage with expert insightsLearn Vinh Long’s heritage with expert insights (Source: Internet)

Vinh Long’s unique blend of river life, orchards, and cultural heritage offers unforgettable experiences. Below are the 10 best activities, updated with current attractions, pricing, and sustainable practices, replacing outdated references like Vinh Sang Tourist Area and Cai Cuong Ancient House, which have diminished in appeal or relevance for international travelers.

1. Cruise Tra On Floating Market

  • Description: Glide along the Hau River to Tra On Floating Market in Tra On Ward, a vibrant hub where wholesale boats trade Cam Xoan Tra On oranges ($3–$6/kg or 75,000–150,000 VND) and dishes like Ca Tai Tuong ($2–$6 or 50,000–150,000 VND). Experience Mekong river commerce at its liveliest during high tide.

  • Details:

    • Cost: $10–$20 (250,000–500,000 VND) for 2–3 hour boat tour, 4–8 passengers.

    • Location: Tra On Ward, 20 km from city center.

    • Access: Book sampan or motorboat at Vinh Long wharf or through Legend Travel Group’s Mekong Food Tour ($80–$120).

  • Eco-Friendly Note: Choose human-powered sampans or electric motorboats; avoid plastic waste in waterways.

  • Tip: Visit at 5:00–7:00 AM for peak activity; pair with Phat Ngoc Xa Loi Pagoda.

  • Best Time: November–April for calm waters; May–October for lush scenery.

2. Cycle An Binh Island Orchards

  • Description: Pedal through An Binh Island’s 60 km² of lush orchards and villages, picking Nam Roi pomelo ($2–$5/kg or 50,000–125,000 VND) or Ri 6 durian ($6–$10/kg or 150,000–250,000 VND). Visit Tien Chau Pagoda, a 250-year-old Khmer temple.

  • Details:

    • Cost: Bicycle rental $2–$6/day (50,000–150,000 VND); ferry $0.50–$1 (12,500–25,000 VND); orchard tours $5–$10 (125,000–250,000 VND).

    • Location: An Binh Island, 10 km from city center via ferry.

    • Access: Take ferry from Cuu Long B Hotel dock; rent bikes at ferry dock or homestays.

    • Booking: Book through Legend Travel Group’s Fruit Tour ($80–$120).

  • Eco-Friendly Note: Bicycles are zero-emission; support organic orchards.

  • Tip: Ride in the morning (6:00–10:00 AM) for cooler weather; wear a helmet ($1–$2 or 25,000–50,000 VND).

  • Best Time: December–April for fruit season; November–April for dry paths.

3. Experience Don Ca Tai Tu Music

  • Description: Immerse in Don Ca Tai Tu, a UNESCO-recognized folk music, performed by small ensembles at homestays or river cruises. Enjoy soulful melodies with dan tranh (zither) while savoring Banh Xeo ($1–$3 or 25,000–75,000 VND).

  • Details:

    • Cost: $5–$10 (125,000–250,000 VND) at homestays; $15–$25 (375,000–625,000 VND) on boat tours; free during festivals.

    • Locations: Mekong Pottery Homestay (An Binh Island), Vinh Long Night Market (Ward 1), Phat Ngoc Xa Loi Pagoda (Tra On Ward).

    • Booking: Book through Legend Travel Group’s Cultural Tour ($85–$130).

  • Eco-Friendly Note: Support local musicians; combine with eco-friendly boat tours.

  • Tip: Attend evening shows (6:00–8:00 PM); visit during Ok Om Bok (October/November) for festive performances.

  • Best Time: November–April for outdoor shows; year-round for homestay experiences.

4. Visit Van Thanh Mieu Temple

  • Description: Explore Van Thanh Mieu Temple, a rare Confucian temple built in 1864 along the Long Ho River, honoring Confucius and Phan Thanh Gian. Its Tam Quan gate and bonsai garden create a serene atmosphere, with ceremonies on the 4th–5th days of the 7th lunar month.

  • Details:

    • Cost: Free entry; guided tours $10–$20 (250,000–500,000 VND).

    • Location: Ward 4, 5 km southeast of city center.

    • Access: Cycle ($2–$6/day or 50,000–150,000 VND) or Xanh SM electric taxi ($5–$8 or 125,000–200,000 VND).

    • Booking: Book through Legend Travel Group’s Cultural Tour ($85–$130).

  • Eco-Friendly Note: Use bicycles or electric taxis; respect the temple’s sanctity.

  • Tip: Visit in the morning (5:00–11:00 AM) for peace; dress modestly.

  • Best Time: November–April; lunar 7th and 10th months for ceremonies.

5. Explore Mang Thit Brick Factory

  • Description: Visit Mang Thit village’s beehive-shaped kilns, the Mekong Delta’s largest hub for red brick and ceramic production. Observe traditional craftsmanship and buy pottery souvenirs ($2–$5 or 50,000–125,000 VND).

  • Details:

    • Cost: Boat tour $10–$15 (250,000–375,000 VND); workshops $5–$10 (125,000–250,000 VND).

    • Location: Mang Thit village, 15 km from city center.

    • Access: Reach by motorboat or Xanh SM electric taxi ($8–$12 or 200,000–300,000 VND).

    • Booking: Book through Legend Travel Group’s Cultural Tour ($85–$130).

  • Eco-Friendly Note: Support artisans; choose electric boats.

  • Tip: Visit in the morning for active kilns; pair with Vinh Long Market.

  • Best Time: November–April for pleasant weather.

6. Join a Cooking Class at a Homestay

  • Description: Learn to prepare Mekong Delta dishes like Lau Cua Dong (crab hotpot, $3–$8 or 75,000–200,000 VND) or Cha Gio (spring rolls, $1–$3 or 25,000–75,000 VND) at Cocohome Homestay or Tra On Riverside Homestay, engaging with local families.

  • Details:

    • Cost: $12–$20 (300,000–500,000 VND); homestay stay $12–$35/night (300,000–875,000 VND), includes breakfast.

    • Locations: Cocohome Homestay (An Binh Island, 10 km), Tra On Riverside Homestay (Tra On Ward, 20 km).

    • Booking: Book through Legend Travel Group’s Foodie Tour ($75–$110).

  • Eco-Friendly Note: Uses locally sourced ingredients; supports family-run homestays.

  • Tip: Book evening classes for communal dining; pair with market visits.

  • Best Time: November–April for outdoor classes; rainy season for indoor sessions.

7. Visit Khmer Cultural Museum and Phat Ngoc Xa Loi Pagoda

  • Description: Explore Khmer heritage in Tra Vinh Ward at the Khmer Cultural Museum and Phat Ngoc Xa Loi Pagoda, featuring a Jade Buddha statue. Enjoy Num Banh Chok ($2–$5 or 50,000–125,000 VND) during festivals like Chol Chnam Thmay.

  • Details:

    • Cost: Free entry; guided tours $10–$20 (250,000–500,000 VND).

    • Location: Tra Vinh Ward, 15 km from city center.

    • Access: Cycle ($2–$6/day or 50,000–150,000 VND) or Xanh SM electric taxi ($8–$12 or 200,000–300,000 VND).

    • Booking: Book through Legend Travel Group’s Cultural Tour ($85–$130).

  • Eco-Friendly Note: Support cultural preservation; use bicycles or electric taxis.

  • Tip: Visit during Ok Om Bok (October/November); engage with locals about Khmer traditions.

  • Best Time: October–November for festivals; November–April for pleasant weather.

8. Stroll Vinh Long Night Market

  • Description: Wander Vinh Long Night Market in Ward 1, tasting street foods like Hu Tieu noodle soup ($2–$5 or 50,000–125,000 VND) and enjoying impromptu Don Ca Tai Tu performances. Shop for local crafts and fruits.

  • Details:

    • Cost: Free entry; food and crafts $1–$6 (25,000–150,000 VND).

    • Location: Ward 1, city center.

    • Access: Walk or cyclo ($1–$4/hour or 25,000–100,000 VND).

    • Booking: No booking needed; guided tours via Legend Travel Group’s Foodie Tour ($75–$110).

  • Eco-Friendly Note: Use reusable totes; support local vendors.

  • Tip: Visit evenings (5:00–9:00 PM) for vibrant atmosphere; try coconut candy ($2–$5 or 50,000–125,000 VND).

  • Best Time: November–April for dry evenings; January/February for Lunar New Year.

9. Stay at Mekong Pottery Homestay

  • Description: Experience authentic Mekong life at Mekong Pottery Homestay on An Binh Island, offering rustic bungalows, outdoor showers, and local cuisine. Join pottery workshops or Don Ca Tai Tu performances.

  • Details:

    • Cost: $15–$35/night (375,000–875,000 VND), includes breakfast; workshops $10–$20 (250,000–500,000 VND).

    • Location: An Binh Island, 10 km from city center.

    • Access: Ferry ($0.50–$1 or 12,500–25,000 VND) + bicycle or walk.

    • Booking: Book through Legend Travel Group’s Island Adventure ($150–$200).

  • Eco-Friendly Note: Supports family-run homestays; uses local ingredients.

  • Tip: Book in advance; pair with orchard tours for a full day.

  • Best Time: November–April for comfortable stays; year-round for cultural immersion.

10. Explore My Thuan Bridge

  • Description: Walk or cycle across My Thuan Bridge, Vietnam’s first cable-stayed bridge, for stunning views of the Tien River and surrounding orchards. A local landmark, it connects Vinh Long to nearby provinces.

  • Details:

    • Cost: Free; bicycle rental $2–$6/day (50,000–150,000 VND).

    • Location: 10 km southwest of city center.

    • Access: Cycle from city center or take Xanh SM electric taxi ($5–$8 or 125,000–200,000 VND).

    • Booking: No booking needed; guided tours via Legend Travel Group’s Cultural Tour ($85–$130).

  • Eco-Friendly Note: Use bicycles for zero-emission travel.

  • Tip: Visit at sunrise or sunset for scenic photos; pair with a trip to Mang Thit.

  • Best Time: November–April for clear views.

Best Time to Visit Vinh Long

Embrace the vibrant spirit of Vinh Long Travel adventuresEmbrace the vibrant spirit of Vinh Long Travel adventures (Source: Internet)
  • November–April (Dry Season, 24–32°C or 75.2–89.6°F): Ideal for outdoor activities with clear skies and moderate crowds (80–200 daily visitors). Book tours 1–2 weeks ahead.

  • May–October (Rainy Season, 26–36°C or 78.8–96.8°F): Lush greenery and abundant fruits; fewer crowds (50–150 daily visitors). Bring rain gear ($3–$6 or 75,000–150,000 VND). Last-minute bookings often available.

  • Festival Seasons:

    • Ok Om Bok (October/November): Khmer festival with boat races and music, drawing 300+ visitors.

    • Chol Chnam Thmay (April): Khmer New Year with cultural feasts.

    • Lunar New Year (January/February): Vibrant markets; book 2–4 weeks ahead.

  • Timing Tip: Morning activities (5:00–10:00 AM) for markets and orchards; evenings (5:00–9:00 PM) for music and dining.

Getting to Vinh Long

Seize the vibrant spirit of Vinh Long TravelSeize the vibrant spirit of Vinh Long Travel (Source: Internet)
  • From Ho Chi Minh City (135 km, 2.5–3.5 hours): Bus ($7–$15 or 175,000–375,000 VND) from Mien Tay Bus Station; Xanh SM electric taxi ($100–$130 or 2,500,000–3,250,000 VND); private car ($70–$90 or 1,750,000–2,250,000 VND).

  • From Hanoi (1,700 km, 4.5–5 hours): Flight to Can Tho ($70–$140 or 1,750,000–3,500,000 VND) + taxi ($12–$18 or 300,000–450,000 VND); flight to Ho Chi Minh City ($60–$120 or 1,500,000–3,000,000 VND) + bus ($7–$15 or 175,000–375,000 VND).

  • From Can Tho (40 km, 40–60 minutes): Taxi ($12–$18 or 300,000–450,000 VND); bus ($2–$5 or 50,000–125,000 VND).

  • Navigation Tip: Save “Vinh Long, Vinh Long Province” in offline maps (Maps.me). Parking: $0.50–$1 (12,500–25,000 VND).

  • Eco-Friendly Note: Opt for buses or Xanh SM taxis; book through Legend Travel Group for sustainable transport.

Getting Around Vinh Long

Photograph the soulful allure of Vinh Long’s heritagePhotograph the soulful allure of Vinh Long’s heritage (Source: Internet)
  • Walking: Free, ideal for city center (1–3 km radius).

  • Cyclo: $1–$4/hour (25,000–100,000 VND), eco-friendly.

  • Bicycle Rental: $2–$6/day (50,000–150,000 VND), sustainable.

  • Xanh SM Electric Taxi: $0.50–$1/km (12,500–25,000 VND).

  • Ferry to An Binh Island: $0.50–$1 (12,500–25,000 VND, 5–10 minutes).

  • Eco-Friendly Note: Prioritize bicycles or electric taxis; book through Legend Travel Group.

  • Tip: Confirm fares upfront; rent bikes near Vinh Long Market or ferry docks.

What to Pack for Vinh Long

Begin your Vinh Long Tours with a scenic adventureBegin your Vinh Long Tours with a scenic adventure (Source: Internet)

Pack these essentials for a sustainable trip:

  • Clothing: Lightweight, breathable attire, sturdy sandals, hat; waterproof poncho ($3–$6 or 75,000–150,000 VND) for rainy season; modest clothing for temples.

  • Gear: Reusable water bottle ($0.80 or 20,000 VND), reusable tote ($1–$3 or 25,000–75,000 VND), biodegradable hand wipes.

  • Essentials: Compact umbrella ($3–$6), hand sanitizer, mosquito repellent ($0.80 or 20,000 VND), sunscreen ($2–$5 or 50,000–125,000 VND).

  • Tech: Smartphone with Vietmap/Maps.me, portable charger; Vietnamese SIM card ($6–$12 or 150,000–300,000 VND).

  • Documents: Passport copy, travel insurance, VND (10,000–50,000 notes).

Costs and Budget Planning

Tasting local DelicaciesTasting local Delicacies (Source: Internet)

Activity Costs

  • Boat Tours: $10–$20 (250,000–500,000 VND).

  • Orchard Tours: $5–$10 (125,000–250,000 VND).

  • Cooking Classes: $12–$20 (300,000–500,000 VND).

  • Don Ca Tai Tu Performances: $5–$25 (125,000–625,000 VND).

  • Guided Tours: $20–$40 (500,000–1,000,000 VND).

  • Market Purchases: $1–$6 (25,000–150,000 VND).

Transport Costs (Local)

  • Bicycle Rental: $2–$6/day (50,000–150,000 VND).

  • Ferry: $0.50–$1 (12,500–25,000 VND).

  • Xanh SM Electric Taxi: $0.50–$1/km (12,500–25,000 VND).

Total Daily Cost (Per Person)

  • Budget: $15–$30 (self-guided cycling, market snacks).

  • Mid-range: $35–$60 (guided boat tour, homestay dining).

  • Luxury: $80–$120 (premium guided tours, dining).

Practical Tips for Vinh Long Activities

Enjoying Meals at the local’s homeEnjoying Meals at the local’s home (Source: Internet)
  • Timing: Plan morning activities (5:00–10:00 AM) for markets and orchards; evenings (5:00–9:00 PM) for music and dining. Expect 50–150 visitors on weekdays, 80–200 on weekends.

  • Booking: Reserve Legend Travel Group’s tours 24–48 hours ahead; book festival tours (January/February, October/November) 2–4 weeks ahead. Homestays and boats require 1–2 days’ notice.

  • Sustainability: Use reusable items; support local farmers with fruit purchases ($2–$10/kg or 50,000–250,000 VND). Choose eco-friendly transport like bicycles or electric taxis.

  • Navigation: Save “Vinh Long, Vinh Long Province” in offline maps; most attractions are within 1–20 km of the city center.

  • Safety: Secure valuables; wear life jackets on boats. Avoid heavy rain for outdoor activities.

  • Cultural Respect: Greet with “xin chào”; respect local customs at temples and markets.

Legend Travel Group’s Eco-Friendly Tours in Vinh Long

Visiting Cai Cuong Ancient HouseVisiting Cai Cuong Ancient House (Source: Internet)

Discover Vinh Long with our sustainable tour packages:

  • Vinh Long Foodie & Nature Tour ($75–$110/person, 1 day): Cruise Tra On Floating Market, cycle An Binh Island, taste Ca Tai Tuong. Includes guide, eco-transport, meals.

  • Vinh Long Island Adventure ($150–$200/person, 2 days): Explore An Binh orchards, Van Thanh Mieu Temple, and Don Ca Tai Tu at homestays. Includes meals, guide, eco-transport.

  • Mekong Delta Explorer ($350–$500/person, 4 days): Visit Tra On, Tra Vinh, and Mang Thit with boat, bike, and cultural tours. Includes meals, eco-transports.

  • Prices include guides, eco-transport, fees. 15% off for groups of 8+! Book now for an unforgettable journey.

Conclusion

Stay at Ut Thuy HomestayStay at Ut Thuy Homestay (Source: Internet)

Vinh Long Province, a Mekong Delta gem 135 km from Ho Chi Minh City, captivates with 10 vibrant activities, from cruising the bustling Tra On Floating Market to cycling through An Binh Island’s lush orchards and savoring the soulful Don Ca Tai Tu music, a UNESCO Intangible Cultural Heritage. These experiences, accessible for $1–$5 (25,000–125,000 VND), draw thousands yearly to explore the region’s rich culture and natural beauty. Legend Travel Group’s Vinh Long Tours ensure a sustainable Vinh Long Travel experience, blending eco-friendly practices like low-impact boat tours and community-led homestays with visits to Cai Be Floating Market, Van Thanh Mieu Temple, and Mang Thit Terracotta Village. Don’t miss out—contact Legend Travel Group to browse our featured tours and book your eco-friendly adventure today!
Ready to experience Vinh Long’s top activities? Reserve your sustainable tour with Legend Travel Group and dive into the Mekong Delta’s authentic charm!

Author Bio: Written by Tony Bùi, with over 20 years of experience in the travel industry, guiding 100,000+ travellers across Southeast Asia. This guide draws from firsthand insights, guest feedback from Legend Travel Group surveys.

Sources:

  • Vinh Long Activities Information: vietnam.travel, vietnamtourism.org.vn, vemekong.com, tnktravel.com, idctravel.com, luxtraveldmc.com, vietleadingtravel.com

Select an option...

TOP DEALS

Favorite experiences booked by travelers

Top experiences

Dive into the verdant charm of Vinh Long Travel

Vinh Long Travel Guide: Best Seasons to Visit the Mekong Delta Gem

Start your Vinh Long Travel with tranquil vistas

Vinh Long Travel Guide: Must-Visit Destinations in the Mekong Delta

Dive into the scenic charm of Vinh Long Travel

Vinh Long Travel Guide: How to Get Around by Motorbike in the Mekong Delta

Dive into the vibrant charm of Vinh Long Travel

Vinh Long Travel Guide: How to Drive from Ho Chi Minh City to Vinh Long

Dive into the flavorful charm of Vinh Long Travel

Vinh Long Foodie Guide: Discover the Irresistible Ri 6 Durian in the Mekong Delta

Begin your Vinh Long Tours with a scenic adventure

Vinh Long Travel Guide: Unforgettable Adventures in the Heart of the Mekong Delta

Dive into the flavorful charm of Vinh Long Travel

Vinh Long Foodie Guide: Savor the Unique Nam Moi (Bean Chicken Mushroom) in the Mekong Delta

Dive into the juicy flavors of Vinh Long Travel

Vinh Long Foodie Guide: Savor the Sweet Chom Chom (Rambutan) in the Mekong Delta

Dive into the melodic charm of Vinh Long Travel

Vinh Long Travel Guide: Experience the Soulful Don Ca Tai Tu Music

Seize the vibrant spirit of Vinh Long Travel

Vinh Long Culinary Guide: Must-Try Delicacies in the Mekong Delta