This abandoned, windowless concrete block is one of the strangest buildings in Tulsa.

The ruins of an 11th-century Norman castle with a rare, perfectly circular shape.

Scenic mount trashmore, Virginia Beach's most curious waterfront still has a couple of secrets.

The third tallest lighthouse in America once guided author Stephen Crane to safety.

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

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

This remote castle was built to be a wealthy businessman's palace of vice but is now simply a historic vacation cottage.

This antique prison is a tourist attraction with a sordid past.

These "bridges" help confused bats cross the road.

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

Now famous as the "Harry Potter bridge," this impressive concrete viaduct has long been an icon in its own right.

Down the road from where the Wright brothers lifted off is another flight tribute practically hidden from sight in the woods.

This beautifully historic Bahrain fortress might not be the most popular attraction around, but that might make it all the better.

The bombed out remains of the old church were kept intact next to the new one, as a reminder of the futility of war.

The Tudor-style cottage in the middle of the square is not quite what it seems.

Celebrating the Eucharist, the day is a legal holiday in many parts of Germany.

100 year tradition of fist fights, marked by marble footsteps.

Venice's island of the dead.

The world's most active stratovolcano is almost always erupting.

Erotic art covers the walls of the largest ancient pleasure palace.

Ancient snack bar of the Roman Empire re-opened.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

This highway overpass was named after the tragic disappearance of a young mother who got mixed up with the wrong people.

Home to the story of the outlaw turned funhouse mummy, Elmer McCurdy.