The Stockholm underground is actually considered the world’s largest art gallery and nearly all of the stations resemble and art gallery or museum. In fact these are so awe-inspiring, many miss their trains as they admire the art work. There are more than 140 artists who are represented across 90 of the station including both permanent and temporary exhibits. The highlight of this underground system is the T-Centralen station where all three stations meet. The blue line section was painted back in 1970 and huge lines of blue and white adorn the walls and ceilings as well as rustic arches and columns decorated with mosaics. It doesn’t matter which station you head to here, they are all ultimately beautiful and fabulous. Spend all day riding the metro and discover a whole new world of underground art.