This is the most iconic and frequently visited national park on the island as well as one of the oldest, having been designated a wildlife sanctuary in 1900. The animals most commonly seen here are elephants, leopards and aquatic birds. Additionally, Sloth Bears are also present within this park, but are a very rare sight. What is most notable is that the park also contains two pilgrimage sites since it has hosted more than one ancient civilisation. There is evidence to be found of a complex irrigation system that was once present within the park and according to the ancient legend of Ramayana, the demon King of Sri Lanka built his Kingdom in an area around the park that has now been submerged in the sea.