Wow, amazing. http://twistedsifter.com/2012/05/stockholm-metro-worlds-longest-art-gallery/ At 110 kilometers (68.3 miles) in length, the Stockholm Subway System is said to be the world’s longest art exhibit. Travelling by metro is like travelling through an exciting story that extends from the artistic pioneers of the 1950s to the art experiments of today. Over 90 of the 100 subway stations in Stockholm have been decorated with sculptures, mosaics, paintings, installations, engravings and reliefs by over 150 artists. What a fun and inexpensive way to explore the art and culture of an incredible city like Stockholm! Below you will find a gallery that shows off the diverse artwork of the Stockholm Metro, along with some additional factoids about the artwork and history of the metro.