Claim: Kostenets is a town in Sofia Province, Bulgaria, located at the base of Rita Mountain.
Evidence: Kostenets (Bulgarian: Костенец [ˈkɔstɛnɛt͡s) is a town in Sofia Province in southwestern Bulgaria, and the administrative centre of the Kostenets Municipality (which also contains a separate village of Kostenets). The town is situated at the foot of Rila Mountain, about 70 km (43 mi) southeast of capital Sofia.