There are many natural wonders in Vietnam. And Ha Long bay is one of the most beautiful natural wonders.

     Ha Long bay is in Quang Ninh Province. It's about 120 kilometres from Hai Duong City. To get there, you can go by car and it takes you 2 hours to get there. There are many islands there. They are named after things around us. For example: Rooster and Hen island (Trong Mai island), Man's Head island (Dau Nguoi island). You must take a boat trip around the bay to go sightseeing. It's very interesting, you' ll see. Beside that, the seafood is cheap, fresh and delicious. You can enjoy seafood in the restaurant, it isn't too expensive. You can join in many outdoor activities, too. Ha Long bay is the most Vietnam's natural wonders. Thanks for reading !

(Đây là bài văn của mk, bn tham khảo nhé)

Vietnam have a lot of natural beauty. Ha Long Bay is located in northeast Vietnam, is part of the west coast  Bac Bo bay. My feeling about Ha Long Bay was first to see firsthand the magical beauty that nature has bestowed to Vietnam is similar to what I learned about through books and television: Ha Long bay is really beautiful and sexy.  Ha Long Bay as a huge picture wearing extremely lively. That's the beautiful art works, the flowers of creation, of nature turn thousands of islands senseless silence became quite sculpture, painting with all our perfect appearance, charm, just very familiar just as alien to human beings. Thousands of islands bobbing on the waves of shimmering, majestic both strong but also very soft and graceful, lively. Ha Long bay is beautiful, but would be nicer, more romantic if colored by the sentiments of respect and love for visitors to the bay. You and I, we have the owner just as tourists, we get together to preserve the precious gift that nature has bestowed favor for the country of Vietnam. Ha Long bay is the wonder in the world. Ha Long bay-my love.

hoặc

It is Ha Long Bay is in Quang Ninh province. It is very far. It's about 100km from my house. I can get there by bus. It's very very beatiful. It has many islands, caves and seafood. I like take a boat ride to Tuan Trau islands and sunbathe on the beach. I hope I'll have a chance to visit is next summer