Khao Sam Roi Yot National Park

Khao Sam Roi Yot, meaning Three Hundred Peaks, is a national park on the Gulf of Thailand coast in Prachuap Khiri Khan Province characterised by dramatic limestone outcrops rising from coastal marshland. The park's most celebrated feature is Phraya Nakhon Cave, a large cavern with two collapsed ceiling openings that allow shafts of sunlight to illuminate a royal pavilion constructed for King Rama V in 1890. The surrounding wetlands are important habitat for wintering migratory birds, and the coastal mudflats support large flocks of waterbirds. The cave is accessed by a hillside trail or by boat.