Vietnamese gulf of 1,600 limestone karst islands and islets. Inscribed 1994.
From Wikipedia
Hạ Long Bay or Halong Bay is a bay located in Northeastern Vietnam, administered by Quảng Ninh province. The name Hạ Long means "descending dragon". It features thousands of limestone karsts and islets in various shapes and sizes, for which it is listed as a UNESCO World Heritage Site and a popular travel destination. The bay is also part of a larger area that includes Bai Tu Long Bay to the northeast and Cát Bà Island to the southwest, with these zones sharing similar geological, geographical, geomorphological, climate, and cultural characteristics.