Ha Long Bay is a UNESCO World Heritage Site, and a popular travel destination, located in Quang Ninh Province, Vietnam. Administratively, the bay belongs to Ha Long City, Cam Pha town, and part of Van Don District. The bay features thousands of limestone karsts and isles in various sizes and shapes. Ha Long Bay is a center of a larger zone which includes Bai Tu Long bay to the northeast, and Cat Ba islands to the southwest. These larger zones share similar geological, geographical, geomorphological, climate, and cultural characters.