World's Most Beautiful Museums

Hedmark Museum: Hamar, Norway

Set on 400 grassy acres near Mjøsa Lake, the Hedmark Museum complex features open-air exhibitions, a rebuilt 18th-century farmhouse, even an herb garden. The jewel in its crown, however, is the ruins of a cathedral constructed in the 1150s and partially destroyed in 1567. The four grand arches that remain are now sheltered under a soaring triangle of glass and steel. The setting has become popular for weddings and events, so you might have to wait for a break in the action to peek inside.