The Cyrillic text on the billboard strongly suggests a country like Bulgaria. The architecture of the tall, blocky apartment building in the background is typical of Eastern European socialist-era urban planning. There is significant snow on the ground, indicating a cold climate. The metal fencing and general street layout look very familiar for a city in this region. I suspect I am in Sofia, Bulgaria. I am moderately sure.

then: forward

The view confirms the previous assessment, with the distinct metal pedestrian fencing and the specific style of the apartment blocks pointing strongly toward Sofia. The mountains visible in the distance are consistent with the Vitosha mountain range that overlooks the city. The low winter sun and snowy conditions are typical for this time of year in the Bulgarian capital. I am now quite confident in this location.

then: guess