Åhléns City sits at the corner of Sergels Torg and Drottninggatan, Stockholm's longest pedestrian shopping street. The brown building with the clock on its façade is one of the city's largest department stores, but its real curiosity is on the ground floor: a branch of Systembolaget, Sweden's state-run alcohol monopoly, where you can browse wine and spirits but only during tightly regulated hours, and only if you're 20 or over. Eighteen will get you a drink in a bar, but not a bottle to take home.

The store rose from one of the most ambitious urban experiments in European history. In the mid-twentieth century, Stockholm demolished some 700 buildings from the 1700s and 1800s to build a modernist city centre, a project so radical it inspired the reconstruction of Hamburg and Warsaw.

VoiceMap's self-guided audio tours trace this transformation across Sergels Torg, explaining how the square, the metro station beneath it and the department store above replaced centuries of older architecture.