Stockholm

Stockholm's subway is referred to as the world's longest art gallery because works of art have been integrated in almost every station since the 1950s. SL spends 10 million SEK per year in safeguarding and developing artwork. Photo [from SL's free metro art booklet): Platform of T-Centralen station on the Blue Line, designed by Per Olof Ultvedt in 1975.

Many stations in Stockholm have been left as rock caverns, especially on the Blue Line, which gives them an outstanding, unique atmosphere. Works of art can be found in 90 of the 100 stations. 140 artists have contributed so far. Photo: Rinkeby station built in 1975 on the Blue Line with gold mosaics, paintings, and sculptures.

Munich

This metro system has been opened in 1972 and has spacious and clean stations. The earlier ones are rather minimalistic in design while the later ones got more interesting architectural features and some works of art [oliverbarchewitz.de]. Photo: Dülferstraße station from 1993 by Peter Lanz and Jürgen Rauch.

Photo: Westfriedhof station from 1998 with its simple concrete walls and its exceptional lighting concept by Ingo Maurer.