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Prohodna Cave, Karlukovo, Bulgaria Stock Photography

Title

Prohodna Cave, Karlukovo, Bulgaria #102009710

Description

Prohodna is a karst cave in north central Bulgaria, located in the Iskar Gorge near the village of Karlukovo in Lukovit Municipality, Lovech Province. The cave is known for the two eye-like holes in its ceiling, known as the Eyes of God or Oknata. Formed during the Quaternary, Prohodna is 262 metres 860 ft long, which makes it the longest cave passage in Bulgaria.