
The “Eyes of God” of Bulgaria: how geology created one of the most astonishing caves in the world
Source: By Totto from Sofia, Bulgaria – The eyes are watching you, CC BY–SA 2.0 In Bulgariaabout 112 km from the capital Sofia, in the gorge of the Iskar river, in the Karst massif of Karlukovo, lies one of the most fascinating places in the whole country: the Prohodna Cave. What makes this gigantic rock tunnel, over 260 meters long, ...








