Wander among the abandoned ruins of this once-powerful medieval town.

This landmark jazz venue is the oldest continuously running African-American club in the United States.

The ruins of an ancient pyramid built by the mysterious Chupícuaro civilization.

A bronze bust commemorates the heroism of the secret agents who led covert operations against the Nazis.

The last occupied troglodyte dwellings in England weren't abandoned until the 1960s.

This Gothic castle-like portal is a testament to the amazing craftsmanship of the navvies who built the railway tunnel.

Beneath Denmark's Højbro bridge, a bronze merman and his seven sons forever mourn for the mother and wife who left them for land.

A beautiful ruin of a 14th-century Plantagenet castle built by a medieval mercenary.

You don't have to be a professional jockey to ride in Britain's oldest horse race.

An extraordinary mix of Phoenician, Roman, early Christian, and Byzantine ruins beautifully set overlooking the Mediterranean.

A spoke-tacular artwork constructed from recycled bicycle rims.

The taxidermy remains of the mighty beast made famous by a Crocodile Dundee film.

A micronation on an islet along the coast of a Portuguese island.

A hidden tunnel leads to a medieval queen's shrine buried beneath a parking lot.