Castle 
Fort 
Tower 
Other
Castles in the United Kingdom
England
- Amberley Castle
- Berkhamsted Castle
- Bodiam Castle
- Bramber Castle
- Broadwood's Tower
- Buckden Towers
- Buckenham Castle
- Bungay Castle
- Canterbury Castle
- Clare Castle
- Cooling Castle
- Cowdray House
- Deal Castle
- Donnington Castle
- Eastbourne Redoubt
- Eridge Towers
- Eye Castle
- Eynsford Castle
- Framlingham Castle
- Old Gorhambury House
- Hastings Castle
- Hedingham Castle
- Knepp Castle
- Lullingstone Castle
- Martello Tower No. 1
- Martello Tower No. 2
- Martello Tower No. 3
- Martello Tower No. 4
- Martello Tower No. 28
- Martello Tower No. 55
- Martello Tower No. 60
- Martello Tower No. 61
- Martello Tower No. 62
- Martello Tower No. 64
- Martello Tower No. 66
- Martello Tower No. 73
- Martello Tower No. 74
- Odiham Castle
- Orford Castle
- Painshill Gothic Tower
- Racton Tower
- St. Leonard's Tower
- Sandgate Castle
- Saxonbury Tower
- Severndroog Castle
- Someries Castle
- Stone Castle
- Vandalian Tower
- Walden Castle
- Wallingford Castle
- Walmer Castle
- Warblington Castle
- Wayneflete Tower
- Weeting Castle
- Wimpole Castle
- Ypres Tower