A boxy, four-storey structure of Scandinavian pine is rising out of the snow on Stockholm's Djurgården Island, sandwiched between the city's largest funfair and a restored 17th-century warship.

From its opening day, on 7 May, Abba The Museum, the city's first monument to the Swedish supergroup, is expected to lure hundreds of thousands of tourists a year to belt out versions of hits such as Super Trouper, Dancing Queen and Waterloo, alongside holographic images of the group in all their spangly 70s glory.