* Both castles are located in Northumberland, England.
* Both castles are medieval fortresses.
* Both castles have been used as royal residences.
* Both castles are open to the public.
Additional similarities:
* Both castles are built on rocky outcrops.
* Both castles have large gatehouses.
* Both castles have towers and battlements.
* Both castles have been used as film locations.
Differences between Alnwick Castle and Bamburgh Castle
* Alnwick Castle is larger than Bamburgh Castle.
* Alnwick Castle has more extensive gardens.
* Bamburgh Castle has a more dramatic setting.
* Bamburgh Castle is closer to the sea.
