David Altrath presents “The Metro Series” which highlights the unique underground metro system in Stockholm, Sweden which features installations from local and non-local artists all the way back from 1957. It has become so decorated that it is now considered the longest art exhibition in the world.

Murals, statues, and other installations expand the length of the metro system, leaving nothing bland about the underground. And it’s true — the work adds spice to the system that you can not see in other stations around the world.

Matter of fact, in some cases, the stations were actually built based on the artists’ ideas.