Ha Long Bay is a famous natural wonder of Vietnam. It is located in Quang Ninh Province in the northeast of the country. The bay is known for thousands of limestone islands rising from the blue sea, along with beautiful caves and rich marine life. The scenery is both peaceful and impressive. Visitors can take boat trips, go kayaking, swim, or explore caves to enjoy the natural beauty. Many tourists also like to watch the sunset on the bay. To protect Ha Long Bay, people should not throw rubbish into the sea, reduce plastic waste, and follow environmental rules to preserve this precious landscape.