The blue sign with a white arrow is a classic European one-way street indicator. The architecture of the apartment buildings and the overall overcast, temperate climate strongly suggest a location in Northern or Eastern Europe. The style of the buildings and the vegetation feel very characteristic of the Baltic states or perhaps parts of Russia or Poland. I suspect this is in Lithuania, possibly Vilnius. I am moderately sure.

then: forward

The architecture of these residential buildings, with their specific window styles and stucco finishes, looks very much like the older residential districts of Reykjavik, Iceland. The overcast, cool-toned sky and the specific type of vegetation match the Icelandic landscape perfectly. The narrow, somewhat weathered street also aligns with the residential areas in the capital. I am quite confident this is in Reykjavik, Iceland.

then: guess