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Momchil’s Fortress
Momchil’s Fortress lies near Gradat Village, Smolyan Municipality.
Monyak Fortress
The Monyak Fortress (also known as Mneakos, Mniyak) is in the Rhodope Mountain, 11 km east of the city Kardzhali near the village of Shiroko Pole, and is 586 meters above sea level.
Kastra Martis Fortress
The town of Kula is situated in north-west part of Bulgaria, 35 km southwest from Vidin.
Ustra Fortress
The Ustra fortress, situated near the village of Ustra, is one of the highest strongholds in the Rhodope mountain.
Ovech Fortress
Ovech Fortress is a stone stronghold located east of the town of Provadia, 53 km west of Varna and 410 km east of Sofia.
Castra ad Montanesium
Castra ad Montanesium, the fortress near Montana, lies in the northwestern part of the town, on Kaleto Hill (Fortress Hill).