Dupnisa Cave & Istranca

How many floors can there be inside a mountain? Dupnisa Cave, opening on the forested slopes of the Istranca Mountains near the village of Sarpdere, offers an intriguing answer: three… Made up of three separate caves linked to one another, this underground world is dry and silent in one part, and in another a living place with water flowing through it. So there was a house with floors inside the mountain all along, and we never knew…