Considered by many to be the world's longest art exhibition, the Stockholm subway system stretches over a massive 110 kilometres. Out of the total 100 stations throughout the city, more than 90 of them have been decorated with paintings, mosaics, engravings, reliefs, installations and sculptures by over 150 different artists – a sight you just have to see during your visit.
The remains of the Makalös palace can be found in the Kungsträdgården station, making it look almost like some type of archaeological dig has occured there. Siri Derkert expresses women's rights through her work at Östermalmstorg station, whilst also highlighting some of the environmental issues we have today.
Taking the tour is practically free – the only cost you'll have is in buying a valid subway ticket to be allowed down onto the stations. Here you'll be able to wander around and take your time gazing upon this magnificent and invigorating showcase.