Louisiana Museum of Modern Art

North of Copenhagen on the Øresund shore, Louisiana grew from an old villa into a chain of low pavilions linked by glass corridors that wander through the park, so you are always half outside. Architects Jørgen Bo and Vilhelm Wohlert designed the 1958 museum and every extension after it, which is why it still feels like one calm idea rather than a patchwork. The sculpture park on the lawn above the water, with works by Henry Moore and Alexander Calder, is reason enough to stay. Unusually for a building-led choice, the modern collection and temporary shows are also first-rate, so allow a full day.