Hidden deep within the dense forest hills of Karandagolla near Ella, Nil Diya Pokuna (literally translated as The Blue Water Pond) is an extraordinary natural and historical cavern phenomenon. Reached only through a challenging underground descent, it reveals a vast subterranean lake of crystalline, luminous blue water completely sheltered from natural daylight.
Ancient Oral Tradition & Ravana's Submerged Sanctuary
Local folk beliefs passed down through generations in the Uva province assert that Nil Diya Pokuna was the private royal bathing retreat of King Ravana. The pristine, mineral-rich underground reservoir is fed by deep natural mountain aquifers.
Folklore recounts that the underwater chambers lead to further monolithic stone rooms and ancient escape shafts connecting throughout the Ella mountain massif. The eerie clarity of the water allows subterranean explorers to see dozens of feet down into submerged stone crevices.
Critical Safety & Expedition Advisory
- Certified Guide Mandatory: Never attempt this descent alone. The cave has total darkness, vertical drops, and confusing passages. Always hire an experienced local guide from Karandagolla village.
- Physical Fitness: Requires crawling through narrow stone fissures, chimney descents, and balancing on wet limestone boulders. Not suitable for claustrophobic individuals or young children.
- Essential Gear: Powerful headlamp (plus spare batteries), durable grip gloves, and closed athletic footwear with high traction.
The Underground Journey
The trek begins with a 20-minute hike up a forest trail in Karandagolla to the cave entrance. From the surface mouth, explorers begin a 45-minute descent into perpetual darkness. Rope lines assist in lowering yourself down slick rock ramps.
The reward at the bottom is breathtaking: a vaulted stone cavern opening up to reveal the calm, glowing turquoise waters of the subterranean pool. The temperature underground remains refreshingly cool year-round.
Logistics & Booking a Guide
Karandagolla is located approximately 12 kilometers south of Ella on the Wellawaya Road. Local guide services typically charge between LKR 3,000 and 5,000 per group, which includes safety briefing, high-powered flashlights, and route guidance.