Stockholm’s subway system, the tunnelbana, is the world's longest art exhibition—110 km, with a variety of paintings, sculptures, mosaics, tiles, installations, and other durable art displays put together by 150 artists in over 90 of the city’s 100 stations. Stockholm also has dozens of offbeat museums that showcase its diverse interests—from the ABBA museum, dedicated to the legendary Swedish band, to Fotografiska, the city’s best contemporary photography museum, as well as Skansen, which opened in 1891 to spotlight pre–industrial-era Swedish lifestyles and now is the world’s oldest open-air museum.

When summer rolls around, Stockholmers are out and about celebrating numerous festivals. Summer begins with the most iconic, Midsummer, when both locals and visitors dance around maypoles with wreaths of wildflowers and garlands on their heads. Other popular festivals include Smaka På Stockholm (Taste of Stockholm), which is the country’s largest food festival; Kulturfestival and Street Festival, celebrating the performing arts; Stockholm Pride, Scandinavia’s largest LGBT parade; and various music festivals such as Summerburst.