Ratchaprapha name was given by His Majesty the King Bhumipol, means kingdom lighten. Ratchaprapha or Chieo Lan Dam is really worth visiting for spectacular vistas of the natural beauty and tranquility. It's constructed from rock and clay with 90 m high and 761 m long. Breathtaking scenery can be spotted from the wide-spreading lake amid the Ratchaprapha Dam.