Visit Kronborg Castle

Moorish palace-fortress of Granada.

One of Europe’s largest castle ruins, sprawled across a travertine hill.

16th-century castle, UNESCO-listed.

Renaissance Radziwill palace and park.

The largest ancient castle complex in the world, with St Vitus Cathedral, the Golden Lane cottages and the hourly guard change.

Ottoman-era citadel quarter stacked above the bay of Algiers.

Kronborg, Hamlet's Elsinore, guarding the narrowest point of the Oresund opposite Sweden.

Five original Viking ships in the museum and the cathedral where Danish monarchs have been buried since 1400.