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

Railways may have forged this quintet of lovely tunnels, but now they are open to hikers.

Rising from the sea like a stone monster.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

A Cold War secret surveillance tower used to spy on radio communications.

A church of bones, decorated with 40,000 human skeletons.

In the town of Třeboň, carp is king.

This Czech military museum is home to pink tank that was once a symbol of art and political rebellion.

This unusually shaped mountaintop tower looks like a UFO floating over the city.

Europe's largest natural bridge has a 19th century royal chateau built into its side.

Tall columns of volcanic basalt make up this improbable-seeming rock formation.

Two monstrous faces loom over a village in Czechia.

The soulless eyes of 82 bronze children stare on forever in remembrance of a horrifying World War II massacre.

A larger-than-life statue of the German revolutionist stands proud in a small town where he never lived.

Before serving as James Bond's Casino Royale, this Victorian-era spa catered to the world's elite.

This ruined castle perched atop a rocky peak is a great place for a hike.

Massive installation of Europe's negative stereotypes.

The state bird of New Mexico, constructed entirely out of garbage.

This innocuous New Mexico storefront was once the secret jump-off spot for Manhattan Project scientists.

This old abandoned sign flickers to announce a motel that isn't even there.

A Prada store in the West Texas desert that is never open for business.

An abandoned quicksilver mining town surrounded by the Big Bend parks.

The remnants of an early automobile route across shifting sand dunes can still be found in the deserts of Southern California.