York has more miles of intact city walls than anywhere else in England, and they draw in over a million visitors every year. Originally built as defences in Roman times, they've been added to and rebuilt over the centuries.

The most notable Roman remain is the Multiangular Tower in the Museum Gardens, which has ten sides and stands almost 30 feet high. Visitors wishing to learn a bit more about the walls should visit Micklegate Bar, the four-story gatehouse. The imposing medieval structure contains a small museum that outlines the Roman, Viking, and medieval histories of the wall and city.