Here are just pictures of the two stations: T-Rådhuset and T-Centralen, but they show how beautiful such subway stations can be. Remarkable also that it is apparently possible to bypass the usual graffiti crime.
"Centralen" (central station) is still up to min. End of 2020 belong to the major construction site Stockholm "Slussen" in the city center. The main traffic, especially the long-haul area, will be handled via Stockholm "Södra".