M/S Maritime Museum of Denmark

Hamlet's castle, with cannon batteries facing Sweden across the narrow strait and Holger the Dane in the cellars deep below.

Run by the University of Copenhagen, with touch pools and tanks holding the sea life of the Øresund.

Halls of planes and bicycles, a space exhibition and a room of video games, plus Danish history built in miniature.

Three floors of free open workshops where kids 4 to 16 paint, draw and build, taking their ideas from the art in the galleries.

A sculpture park above the Sound with works by Calder and Henry Moore, and a children's wing of its own.

A Renaissance castle built across three islets in a lake, with an ornate chapel, the Great Hall and a formal Baroque garden beside it.