Underneath Stockholm is the usual web of underground train lines but unlike most cities Stockholm’s Tunnelbanan stations have been turned into an incredible subway Art Gallery. More than 90 of the 100 stations in the 110km tunnel system, have been decorated with paintings, installations, mosaics and sculptures by 150 artists since the 1950s. A MerJa Media photographer spent a whole day underground exploring the system.

Click on the photo to see the large version if you want to enjoy the full impact.