Nildiya Pokuna is 13.3 km from Ella and according to legend, King Ravana kept Sita inside this cave and created a safe and comfortable palace for her. The ruins have been ravaged by time, but the fascinating pond remains.

History
After King Ravana took Sita captive, he hid her in this cave and constructed a magnificent palace for her. Legends suggest that a network of underground passages extended for miles beneath this mountain cave, reaching all the way to Ravana Ella and stretching hundreds of miles, even below the surface of the earth! For more details about this, you can explore websites such as Travel to Ella.
About the pond
Nestled within the mountain of Karandagolla, the enchanting Nil Diya Pokuna pond resides deep inside a cave, reaching an impressive depth of 80 meters. This natural wonder can be accessed through two entrances, with the entrance located within a forest reserve being the most popular among visitors. The serene and secluded setting adds to the allure of this hidden gem, making it one of the best places to visit in Ella.
How to get there
From Ravana Falls, travel 3 km via Wellawaya road then turn at Karandagolla 10th milepost towards Bandarawela. You will have to inquire from the villagers along this route to reach the tunnel. The trek can be tough, and the path is isolated! So go well-prepared.
Religious Significance
Apart from its historical and mythical associations, Nil Diya Pokuna also holds religious significance for some visitors. The cave and pond are believed to have been sanctified by Buddhist monks over the centuries, and you may come across small shrines or offerings made by devotees during your visit.