Yudai Beach, located in Boao, Hainan Province, is a naturally formed, narrow sandy peninsula spanning 8.5 kilometers. Its terrain closely resembles Australia's Gold Coast and Mexico's Cancun, making it a rare sight in Asia. In 1999, Yudai Beach was recognized by the Guinness World Records as the world's narrowest sandy peninsula separating a sea and a river. The accolade has cemented its status as an internationally renowned natural wonder.