The Cube House Museum lets you step inside one of Rotterdam's most photographed buildings to find out whether the interior is as strange as the exterior promises. It is, mostly.

Architect Piet Blom designed the Cube Houses in 1982, tilting each unit 45 degrees and mounting it on a hexagonal pylon so the whole cluster resembles a forest of trees. There are 51 in total, of which 38 are private homes.

Blom's idea was to separate living space from street level, leaving the ground free for pedestrians. What he did not entirely solve was furniture. With only the central core offering vertical walls, fitting a wardrobe in a Cube House requires some creative thinking.

VoiceMap's self-guided audio tours use the Cube Houses to trace Rotterdam's postwar reinvention, connecting Blom's tilted experiment to the bombed-out Blaak street it stands over, where rubble from 1940 was simply used as landfill.