Ha Long Bay or Halong Bay is a UNESCO world heritage site and popular travel destination in Vietnam. The name H? Long means descending dragon. Administratively, the bay belongs to Ha Long city,  and is a part of Vân ??n district. The bay features thousands of limestone karsts and islets in various shapes and sizes. H? Long Bay is a center of a larger zone that includes Bai Tu Long Bay to the northeast, and Cát Bà Island to the southwest. These larger zones share a similar geological, geographical, geomorphological, climate, and cultural characters.