Stockholm, Sweden’s capital, is home to the most beautiful subway system in the world. The subway system has actually been transformed into the world’s longest art exhibit. The subway system has 100 stations, 47 underground, 50 above. The exhibit opened in the 1950 and it is comprised of over 90 stations which have been decorated with paintings, sculptures, mosaics, engravings, etc… Over 150 artist have collaborated over the years to give this subway system its unique pleasing appearance. Below are the images.