FIRST UNDERWATER EXPLORATION OF RAVANA's CAVES - NIL DIYA POKUNA, ELLA, SRI LANKA

Nil Diya Pokuna, a mysterious underground lake, had been explored for years. But no one knew if the lake was part of an underwater cave system. This is a first time SCUBA cave exploration of this lake situated in high altitude, but deep within a mountain, and the subsequent discovery of a massive underwater cave.