Khao Sok / Suratthani

Rajjaprabha Dam Ratchaprapha  or Cheow Lan Dam is a multi-purpose dam in Ban Cheow Lan, Tambon Khao Phang, Ban Ta Kun Dristrist Surattani Province Its purpose is electricity generation, irrigation, flood control, and fishing. Construction started on 9 February 1982. It was inaugurated on 30 September 1987.King Bhumipol Adulyadaj gave the dam the name "Rajjaprabha", meaning 'light of the kingdom.

Rajjaprabha is a rockfill dam with clay core. It is 95 meters high 761 meters long, with a capacity of 5,639 million of water, covering 185 km  The power plant houses three 80 MW generators, totalling 240 MW of generating capacity.

The lake attracts over 70,000 tourists every year. Due to its scenery, it has been called "Guolin”Thailand".Much of the lake is under the supervision of Khao Sok National Pak.