Yes, it is cobblestones. This photo is taken in Gamla Linköping (Old Linköping).
Here comes some information from that place:
In Gamla Linköping (Old Linkoping) one can experience what a small Swedish town was like during the second half of the 19th century. The houses, streets, signs, gardens etc tell the story of people´s everyday life and environment at that time.
This open-air museum comprises about ninety buildings, moved from other parts of Linköping, and consists of three parts: the town quarter, the Valla forest, and the countryside, represented by the Valla Leisure Park.
Cobblestones!