Doune Castle, Scotland
A castle probably most famous for being the location of filming for several scenes in Monty Python and the Holy Grail, the other castle being Castle Stalker (known in the film as "Castle Aaaaarrrrrrggghhh") Since 2004, an annual "Monty Python Day" has been held at the castle to cater to film enthusiasts. I’ve also heard there is a gift shop within the castle that sells plastic swords and coconuts, which you can use to recreate the clattering hooves sound effect and become a Knight of the Coconut yourself. How cool is that??