Red Castle
- Agra Fort
- Akagi (disambiguation)
- Castell Coch
- Château Rouge
- Château Rouge (Paris Métro)
- Château-Rouge
- Kastellorizo
- Kellereischloss
- La Muralla Roja
- Oamaru
- Phanar Greek Orthodox College
- Red Castle (Utah)
- Red Castle Museum
- Red Castle of Tripoli
- Red Castle, Angus
- Red Castle, Shropshire
- Red Fort
- Redcastle
- Redcastle, County Donegal
- Rotenburg (disambiguation)
- St Kevin's College, Oamaru
- Waldsteinburg