The Belogradchik rocks form a 3 km wide and 30 kilometer long strip, and the rock formations reach some 200 meters in height. They were formed at the bottom of a sea as the product of compression some 230 million years ago and then erosion over the last 45 million years. The rocks, made largely of limestone, also hold hundreds of caves. Each one comes with a story. Each rock formation bears a name: Adam and Eve, The Schoolgirl, The Bear, The Shepherd boy, The Dervish, The First slabstone, The Camel, The Mushrooms, The Cuckoo, The Red wall, The Madonna, The Horseman, The Monks, The Mental stone, Rebel Velko, The Pine stone and so on.