Kolkina dupka

"Kolkinata Dupka" (Kolkin's Hole) is one of the hidden treasures of the Sofia region, nestled in the picturesque Svoge municipality, near the village of Lukovo. This natural cave is a true challenge and reward for every adventurous spirit looking to immerse themselves in Bulgaria's unique underground world. Known for its impressive karst formations, "Kolkinata Dupka" offers a spectacular panorama of stalactites, stalagmites, draperies, and delicate cave pearls, all formed over millennia, revealing exquisite subterranean architecture.