Located on the north slopes of the Balkan Mountains is the Belogradchik Fortress, also known as Kaleto Fortress. The fort is nestled on the base of a spectacular rock formation belonging to the Belogradchik massif which consist of strangely shaped sandstone and conglomerate rock formations.
A fort existed here since the Roman times. In the 1st to the 3rd century AD, the Romans built roads across the new provinces of the empire on the Balkan peninsula, as well as some fortresses to guard them. The mission of Belogradchik Fortress was to control the road.