"Sostra" Fortress
Sostra Fortress is a Roman military camp located in the Troyan Balkans, about 12 km north of the town of Troyan. It was built in the middle of the 2nd century - more precisely around 147 AD, during the reign of Emperor Antoninus Pius. The fortress was originally intended as an aid station for the Roman legions stationed in the province of Thrace. In the following centuries, however, it underwent significant changes and improvements, becoming an important military and administrative center. Sostra includes various elements of Roman architecture, such as baths, barracks, warehouses and officers' quarters. The most iconic structure in the fortress is the legion headquarters, which is well preserved and shows the sophisticated engineering skills of the Romans. The fortress walls, preserved to this day, remind us of the majestic dimensions of the castle - its interior is an 11-meter wall puzzle. [...]
"Ustra" Fortress
"Ustra" Fortress is located in The Rhodopes Mountain, near the village of Ustren. It was built in the 10th century. It is located at 1114 m above sea level. Part of the towers can be seen. The fortress walls reach up to 8 m high in places. The fortress itself can be reached by a dirt road that starts before entering the village of Ustren, if you are coming from Dzhebel. The road continues for about 2 km and leads to the former hut "Ustra", which is now a guest house. From there it is about 20 minutes to the fortress. [...]
Lilyache Fortress
Lilyache Fortress is located above the God's Bridge. The fortress consists of a wall with three towers and two entrances, facing south. There were no walls on the west and east, because the terrain was rocky and difficult to traverse. There was also no wall on the north, as the steep rocky banks of the river were sufficient protection. If you travel from Vratsa to the village of Chiren, just before the village there is a road to the left with a sign to God's Bridge. [...]
"Rusokastro" Fortress
Rusokastro Fortress is a medieval fortification located in the Burgas region, about 30 km from the city of Burgas. The fortress occupies a strategic location on top of a rocky hill. Its area is 35 decares. The hill is naturally protected on three sides by the Rusokastrenska River flowing next to it. The interior of the fortress is dotted with various buildings, including a church, barracks and water tanks. Among the most interesting finds unearthed during the excavations were a tablet of a Thracian horseman, and a lead seal of King Peter with the face of Christ. [...]
Asara Fortress
The Thracian and medieval fortress of Asara is located on a hill of the same name, about 1.8 km southwest of the village of Zvezdel. It was built in the 11th-12th century. One of the four towers of the medieval fortress is partially preserved. There is a carved trapezoidal altar and a tomb in the fortress. The Asara fortification was used to guard the mine, which produced gold and silver. A dirt road separates from the road to the Zvezdel mine and leads to a small clearing at the bottom of the hill. A trodden path leads up from the clearing to the fortress. From the top, where the Asara fortress is located, there is a view of the Eastern Rhodopes. [...]
