The giant scales in this museum can still tell if someone is one of the devil's brides just by weight.

This 600-year-old home seems to defy physics.

Hiding the longest subterranean river known in the world.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

A stone slab in Madrid marks the point from which the distances of Spain's national roads are measured.

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.

One of the most spectacular bridges in Spain spans a narrow chasm that divides the city of Ronda.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

A set of 27 bamboo tubes creates an eerie soundscape that changes with the wind.

Its town washed away centuries ago, this lonely tower by the sea tells the tale of a mermaid and a curse.

The Rozenberg wind wall in South Holland makes for smooth sailing through the Calandbrug canal.

This enormous storm barrier is one of the largest moving structures on Earth, with each arm taller than the Washington Monument.

A seven-century-old jail tells a not-so-pleasant history of crime and punishment.

A massive sea stack famous for its appearance in The Goonies.

Only known mainland rookery of the threatened Stellar sea lion.

Commonly referred to as the most photographed Victorian home in the United States.

A massive volcanic plug is now a protected area that hosts a number of bird species.

This tiny tropical village was sick of anonymity so the locals made this sign, which actually changed the name of the town.

Perhaps the only prehistoric monument with its very own public bus stop.

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

This ancient bridge made of stone slabs is said to be reserved for the devil to sunbathe.

An allegorical statue of a giant pregnant woman representing justice and truth.

How did this lovely seaside English village come by such an unusual name?

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