- Alnwick Castle
 - Open to visitors and offers gardens, holiday cottages, farming estate, and more. - Arundel Castle
- Built at the end of the 11th century by Roger de Montgomery, Earl of Arundel.
- Auckland Castle
- Historic castle that has been the home of the Bishops of Durham for over 800 years, and today is the Bishop's official residence.
- Belvoir Castle
- Ancestral home of the Duke of Rutland. Located 7 miles from Grantham.
- British Castles, Stately Homes and Houses
- Short descriptions with links.
- Brodie Castle
- Various events are hosted here throughout the year including theatre, musical events, ranger walks, and flower festivals.
- Burgh Castle@
- Caernarfon Castle@
- Caerphilly Castle@
- Caledonian Castles
- Photographs of Scottish castles.
- Cardiff Castle@
- Castell Coch@
- Castle Howard@
- Castle Stuart
- 17th-century castle near Inverness.
- Castles of Britain
- Newsletter, trip planning, school projects, research, information on the castles of Britain.
- CastleXplorer
- Directory of castles around Great Britain.
- Cawdor Castle
- Features a tour of the gardens, opening details, and more.
- Conisbrough Castle
- Medieval monument open to the public. Includes opening times, a brief history, and general information.
- Conwy Castle
- One of Edward I's chain of Welsh fortresses, completed in 1287.
- Corfe Castle
- A medieval castle which is now an imposing ruin and tourist centre.
- Dolforwyn Castle@
- Drumlanrig Castle@
- Dudley Castle
- By Colin Johnson.
- Dunderave Castle
- Picture gallery and background information about the castle built by the Clan MacNachtan (MacNaughton) in the 16th Century.
- Edinburgh Castle@
- Eilean Donan Castle
- Overlooks the point where three Scottish lochs meet.
- Glamis Castle@
- Great Castles
- Offers links to castle home pages, photographs, myths and legends, and virtual castle tours.
- Great Castles of Wales
- Tribute to fortified medieval architecture with pictures, plans, and history.
- Hedingham Castle
- Famous for its Norman keep, and Queen Anne house. Includes information on opening times, events, history, and more.
- Hemyock Castle
- Historical centre with accommodation and seasonal events.
- Herstmonceux Castle
- Moated castle dating from the 15th Century.
- Hever Castle
- Childhood home of Anne Boleyn. Events include jousting, longbow warfare, and lakeside theatre.
- Leeds Castle
- Built on two islands in the middle of a natural lake. Offers aviary, museum, children's competitions, wining and dining, vineyard, and more.
- Ludlow Castle@
- Norman Castles in Wales
- Presents the pattern of building from the perspective of a three-fold division.
- Old Wardour Castle@
- Oystermouth Castle@
- Pembroke Castle@
- Pencoed Castle
- A fortified Tudor manor house thought to have been built by Sir Thomas Morgan during the first quarter of the 16th Century on the site of a moated Norman castle.
- Pontefract Castle
- What would Pontefract, England be like today if the residents in 1649 had not decided to knock down its famous castle?
- Powderham Castle
- Historic home of the Earl of Devon, built over 600 years ago.
- Ripley Castle
- Ingilby family home since 1320.
- Skipton Castle@
- Stirling Castle@
- Tower of London@
- Traquair House
- Oldest inhabited Scottish castle, open to guests during the summer months. Includes history, brewery and shop information, interior photos, and a map of the grounds.
- Urquhart Castle@
- Warwick Castle@
- Welsh Castle Tours
- Provides photographic tours.
- Whittington Castle Preservation Trust
- Rural community in North Shropshire that wishes to buy the castle in the centre of the village and find a viable and sustainable use for it.
- Windsor Castle@
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