Kaleto Fortress, Vidin Town
The fortress system "Kaleto" is located in Vidin. It is the only one of its kind in Bulgaria. It is a semi-circle with a diameter of 1800 m. with a double stone wall facing the river and a dug ditch filled with water surrounding it. [...]
Serdika Ancient Fortress, Sofia City
The ruins of an antique fortress called Serdika are situated in the subway between the Presidency and Council of ministers in center of Sofia. The town of Serdika is founded in the II c. BC by the Thracian tribe Serds. [...]
"Peristera" Fortress, Peshtera Town
The hill were the fortress is situated is called "Sveta Petka". The name comes from Greek and means a pigeon. Peristera fortress takes the whole area of the hill and has a clearly defined citadel, inner town and outskirts on an area of about 15 decars. [...]
Samuil's Fortress
Samuil's fortress is located between Belasitsa and Ograzhden mountains, 5 km. north of the village of Kluch. It was built probably during the period 1009-1013 during the reign of Tsar Samuil. [...]
Lyutitsa Fortress
Lyutitsa Fortress is among the best preserved medieval fortresses in Bulgaria. It was built on the Rodopi peak "Gradishteto". It is located 6 km away from Ivaylovgrad. [...]