One of the most interesting parts of Stockholm is the metro system. The "tunnelbana" provides not only pretty great transport to many parts of the city but also really cool. A ton of the stations have lots of amazing paintings and installations. I have been meaning to just spend a day seeking out the best ones and finally got the chance to visit a few on my list.
It's hard to force yourself ride public transit for hours at a time and on the day I went the weather was beautiful and I really just wanted to stay above ground. But unfortunately... doing this had been on my "Stockholm bucket list" pretty much since I arrived and now since I am officially under a month left, I had to do it. Even if it was 25 degrees celsius.
The result is a pretty short trip through the subway art. It's a great path if you have only a short time to spend exploring but want to see what it is all about. The path I took centers around T-Centralen, the main station of Stockholm. From there you can see three stations via the red line and three on the blue line, plus T-Centralen. I've seen blogs with some other stations mentioned but these stations are definite highlights.
Red line: T-Centralen -> Östermalmstorg -> Tekniska Högskolan -> Stadion
Blue line: Kungsträdgården -> T-Centralen -> Rådhuset -> Solna Centrum
*** I confess I actually didn't get the chance to visit Kungsträdgården and Solna Centrum on this trip but I've added them to this list because they work well with this itinerary. For pictures of these stations, this provides a good overview!