The Dimnice Cave is spectacular enough on its own. A vertical cave mouth opens up from the earth with a railed path spiraling tens of meters down from the forest above. Once past the locked gate, your guide leads you into a largely unspoiled natural karst cave system. Here you’ll find a treasure trove of geological formations and small animals eking out a life underground. Far down in the cave system, along the underground river, you’ll encounter decaying manmade walls, rusting handrails, and a concrete slab. On the floor are…