Halong Bay, simple a natural wonder Halong's bay is located in northern Vietnam, near the border with China. It is a World Heritage for UNESCO since 1994 and is considered one of the seven natural wonders of the world. The Halong Bay is located in the Gulf of Tonkín and reaches 1,500 square kilometers. It is full of numerous formations of limestone rocks, which form around a set of 1,600 islands and islets, as a giant teeth, which emerge from the water creating a kind of maze of Ensenadas and Canals. The amazing Bay is consists of a dense group of about 1,600 limestone monolithic islands in the Gulf of Tonkín. Each of these stones is crowned with thick jungle vegetation, which rises spectacularly from the ocean. Several of the islands are hollow, with huge caves. Hang Dau Go (wooden stakes cave) is the largest grotto in the Halong area. French tourists visited at the end of the 19th century and called the Grotte des Merveilles cave. Its three great cameras contain numerous stalactites and stalagmites (as well as French graffiti of the nineteenth century). There are two larger islands, Tuần Châu and Cart Bà, which have permanent inhabitants, as well as tourist facilities that include hotels and beaches. There are several beautiful beaches on the smallest islands. Source: https://www.vietnameseprivatetours.com/halong-bay