Casta Martis or Kasta Martis is a Roman fortress located in northwest Bulgaria about 35 kilometers (21.748 miles) southwest of Vidin, in the center of Kula. It is declared as an architectural and constructional monument. A museum is situated close to the fortress which displays all its findings such agricultural, stone-processing and building tools, bronze fibulas and coins and clay lamps and vessels. There is a panoramic platform from where visitors can take a full view of the castle. It is open at all times and night lighting is also available. Guided tours to the castle are also provided in the local language.
Baba Vida is one of the oldest fortresses located in Vidin, Bulgaria. The only medieval castle which is totally preserved and in a perfect state, this building is a major landmark in the town and is a historical monument of the country. Drenched in local legends of the Queen named Vida who established the castle for herself, the structure is Gothic in styling and has elements of renaissance revival. It is a popular tourist attraction in the city and also houses a small museum in its premise.
A popular tourist attraction, the Belogradchik Fortress of northwestern Bulgaria attarcts thousands of visitors every year with its remarkably well-preserved architecture and rich history. Considered to be a national cultural monument, this ancient Roman settlement comprised of thick fortified walls and served as an important defense stronghold until it was conquered by the Ottomans in 1396. Perched on top of a hill, it is accessible via a short and provides stunning views of the surrounding countryside and the neighboring town of Belogradchik. A must visit while touring the region!