The castle category is to covers castles and fortresses.

Burgh Castle

Jessica Nelson

Alnwick Castle

Dominique Some Sources Say

A Duchess Twice Queen and Her Castle Museum

Heather Daveno

Highclere Castle and Estate, a scenical and historical house

Downton Gazette

Henry’s Castle

Heather Daveno

Tigers in the Castle: The Clive Museum

Jennifer Howes

Kenilworth Castle

Corina Apostu