The Belogradchik Rocks, a gigantic petrified world with amazing figures that the elements have chiseled. The rocks are dispersed on a strip of land that is 30 km long and 5 km wide and are conglomerate stone and sandstone, which are reddish because of the iron oxides. Their differing hardness and fusion account for the differing speed of the weathering and erosion processes that have produced this fantastic petrified world. The popular imagination saw in the figures men and animals, invented stories about them and gave them names. Listed as a natural sight in 1949 with a total area of 598.7 ha.