Paradox Museum Stockholm

Paradox Museum Stockholm has more than 70 interactive installations, objects and rooms that play with perception. Visitors can walk through a spinning tunnel, explore a kaleidoscope and pose in an upside-down room. Other exhibits include an infinity room of mirrored reflections and a camouflage room designed to make people disappear against a wall. The museum also has revolving walls, a piano that composes personalised melodies and a room where children appear to grow larger than their parents.

The venue lists opening hours as 10am to 7pm every day, with last admission one hour before closing. Tickets start at SEK 195 for children (about $19.5/£15.0) and SEK 249 for adults (about $24.9/£19.2). A visit takes about 60 to 80 minutes. All ages are welcome, but visitors aged 15 or younger must come with an adult.

The museum is indoors, and visitors can take photos and film. Some installations use light effects that may affect people with light sensitivity; staff can give guidance on arrival. There is no audio guide, but QR codes at the installations link to information about their background and the science behind them. Food and drinks are not allowed in the exhibition area. The address is Sergelgatan 20, beside Hötorget station. From the metro, take the southern exit and go up towards Sergelgatan.