England
- Warwick Castle: shows, towers and family events (on the Merlin pass).
- Dover Castle: medieval keep plus secret wartime tunnels (English Heritage).
- Tower of London: Crown Jewels and Yeoman Warders.
- Alnwick Castle: Harry Potter’s Hogwarts and broomstick training.
Scotland and Wales
- Edinburgh Castle: on its volcanic rock above the city.
- Caernarfon Castle: a mighty fortress cared for by Cadw.
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Last updated: 14 October 2026
