Erawan National Park is a 550 km2 park in western Thailand in the Tenasserim Hills of Kanchanaburi Province, Amphoe Si Sawat in tambon Tha Kradan. Founded in 1975, it was Thailand's 12th national park.
Wikipedia https://en.wikipedia.org/wiki/Erawan_National_Park
Coordinates 14°20'8.007" N 99°4'45.851" E