Valby Vandkulturhus

A 20,000-square-meter nature playground full of play challenges built to get heart rates up.

Copenhagen's largest nature playground, with hills, play islands and five theme towers, next to 17 theme gardens.

In an old cotton-spinning mill under a ceiling hung with water-lily shapes, with Kids'n'Sushi sessions where children roll their own sushi.

The old brewery's stables and its draft horses, and a basement full of bottles from all over the world.

Staff run this fenced playground, with pedal cars to borrow, a zip line and a spider net, in a 1928 park with an Arne Jacobsen bandstand.

Swimming in the harbor itself, at a bath among canals lined with new apartment blocks.