Nobody ever said subways had to look boring. The Stockholm subway system is secretly a huge gallery for artists. It has been named the world's longest art exhibit. Running for a total of 110 km, over 90 of the 100 metro stations that make up the system are decorated with multiple artworks by 150 different artists.

The stations have murals, sculptures, tiles, art displays and installations--some dating back to the 1950′s. Consequently, there are guided tours provided for visitors. Many stations feature exposed bedrock, however artists have been able to incorporate its raw look into beautiful murals of sprayed concrete. One transit ticket buys you access to an art gallery, which is more than a lot of metro companies can boast.

Some of the artists who have works displayed in stations are: Ulrik Samuelson, Per Olof Ultvedt, Erland Melanton, Bengt Edenfalk, Gun Gordillo, Lasse Lindqvist, Anders Åberg, and Karl-Olov Björk. Below is are some images of the stations as well as a video showing some of the works on display.

images via @raulds

[via TheAtlanticCities / PSFK]