Gamla stan metro station

Gamla stan is a station on the Green and Red lines of the Stockholm metro. It is located on the western side of the Gamla stan district of central Stockholm, and is at ground level, although partly under the Centralbron bridge that carries road and mainline rail across the waterways that define the centre of the city. The same waterways are responsible for the ground level location of the station, unusual for a city centre metro station, as the lines cross between the islands of Stadsholmen and Södermalm by a bridge immediately south of the station.

Wikipedia