Clifford's Tower

There's precious little left of York Castle except for this evocative stone tower, a highly unusual four-lobed design built into the castle's keep after the original one was destroyed in 1190 during anti-Jewish riots. An angry mob forced 150 Jews to be locked inside the tower and the hapless victims took their own lives rather than be killed. There's not much to see inside, but the views over the city are excellent.