An architectural oddity hides in plain sight on this iconic London bridge.

A discarded movie prop that was the original monolith for "2001: A Space Odyssey."

A 16th-century artillery fort built to protect England against European invasion.

The world's largest collection of witchcraft regalia.

Cornish legend says these ancient circles were people turned to stone for playing hurling on a Sunday.

A neolithic dolmen that was rebuilt after collapsing during the 19th century.

A circle stone within a stone circle.

The excellent acoustics of this natural amphitheater made it a popular preaching spot for the founder of the Methodist Church.

It is said the legendary wizard once lived in this sea cave beneath Tintagel Castle.

A fantastic castle rumored to be the birthplace of King Arthur.

A island reachable by a causeway at low tide is possibly one of the earliest Western European locations to be identified in text.

Part museum, part piece of Arthurian-inspired history, this stately hall attracts King Arthur fans from miles away.

Now nearly dry, this lake is said to be the ancient home of the Lady of the Lake, and was once thought to be bottomless.