Hạ Long Bay is one of the most famous places of interest in Vietnam. It is located in the northeastern part of the country, in Quang Ninh Province. The bay is known for its emerald waters and thousands of towering limestone islands topped with rainforests. Visitors can take a boat trip to explore the bay, visit caves, and enjoy the beautiful scenery. Hạ Long Bay is not only a natural wonder but also a UNESCO World Heritage Site. It attracts tourists from all over the world, making it a must-see destination when visiting Vietnam.