Vratsa is the largest city in northwestern Bulgaria and the administrative and economic centre of the municipality of Vratsa and Vratsa district. It is located about 112 km north of Sofia, 40 km southeast of Montana.
Situated at the foot of the Vrachanski Balkan, the town is near numerous caves, waterfalls and rock formations. The most famous of them are the Ledenika Cave, Skaklya Waterfall and the Vratsata Pass.
The Vratsa History Museum holds the Rogozen treasure, which is the largest Thracian treasure.
Wikipedia https://en.wikipedia.org/wiki/Vratsa
Coordinates 43°12'10.155" N 23°32'52.897" E