The boating trip on Thenmala dam offers breathtaking views. The Thenmala Dam or Kallada-Parappar Dam, part of the Kallada Irrigation Project, is located on the Kallada River. Thenmala Dam also known as Kallada Dam or Parappara Dam. Thenmala Dam is one of the largest irrigation project in Kerala which is located at a distance of 68 km from Kollam. The dam covers an area of 92,800 hectares. There is a dense forest area around the dam. Thenmala Dam also known as Kallada Dam or Parappara Dam.This dam is located amidst picturesque location with beautiful surroundings at the foothills of the Western Ghats. Bordered with Shendurney Wildlife Sanctuary, Thenmala Dam’s surroundings are developed under eco-tourism development activities.