A riverside park built around the ruins of a massive dam that collapsed in 1909.

This 1920s Dutch barge is now a floating bookstore.

A Neolithic passage tomb said to have sheltered two legendary Irish lovers.

This monument to the victims of a tragic explosion is said to turn and look at passing cars.

A rare pod of derelict midcentury Futuro and Venturo houses lines a semi-abandoned beachfront resort outside Taipei.

An earthwork sculpture built by Robert Smithson in the Great Salt Lake only reemerges during drought.

The dramatic remains of an abandoned farmhouse sit high on the edge of a remote hillside.

A quirky bookstore hidden beneath a sea of whitewashed Greek villas.

It's believed King John of England stayed at this 13th-century castle before riding off to sign the Magna Carta.

This unusual rock formation looks like an apple that has been neatly sliced in half.

Banksy's image of a naked man dangling from the window of a sex health clinic.

One of the most well-preserved temples of ancient Egypt.

Starting with nothing more than discarded conch shells, one man has built an island/bar that would make Jimmy Buffet jealous.

This Roman amphitheater is said to be King Arthur's legendary Round Table.

What's believed to be the country's first shrine is, in Shintō mythology, the annual meeting place of the gods.

An emerald-green grotto just a short trip from Austin.

Monty Python fans will recognize this abandoned mine as the Cave of the Killer Rabbit of Caerbannog.

The "Heroine of Dunkirk" rescued over 7,000 Allied troops during the historic World War II evacuation.

The risqué mixed-media sculptures are supposedly a metaphor for Czech politics.

Ruins of the elaborate house where the enigmatic costume designer threw glamorous parties for New York's theatrical elite.

An ancient stone fortress considered by many to be the eighth wonder of the world.

The real life Hobbiton, this sheep farm has been forever transformed since being built for The Hobbit film series.

Take a sea tractor to the Art Deco hotel on the island that inspired Agatha Christie.

This beautiful fountain was sculpted by a female artist who was ahead of her time.