3. Alnwick Castle – Northumberland
Image: Gail Johnson/Flickr
Image: Lawrence OP/Flickr
The first stones of this massive castle were erected in 1096, and it is still occupied by a duke and his family to this day making it the 2nd largest inhabited caste in England (Windsor Castle is the first). Lucky for visitors the current residents only take up a small part of the castle, and the rest of open to the public. Scenes from the 1991 version of Robin Hood: Prince of Thieves were filmed here, but the castle is best known for being the real-life filming location of “Hogwarts” in the Harry Potter movie series.