Situated about 190 km from Colombo, Kaudulla National Park is dominated by the Kaudulla Tank built by the sister of the famous King Mahasena who was the creator of the Minneriya Tank. Kaudulla was declared a National park in April 1, 2002 by the Sri Lankan government. This is a unique national park in the sense that the two thirds of the park is under water during several months of the year. In addition to the Kaudulla Tank, which dominates the landscape, Kaudulla National Park includes Relapanawa Tank, Olumadu Wewa, Puliyan Kalla wewa, Mineriya-Kanthale Yoda Ela, Aluth Oya and Hatharas Kotuwa Oya.The park is also situated on an elephant migratory path (an Elephant corridor) , which makes this park even more interesting. The park sits in between the Somawathi National Park and the Minneriya National Park.