For over 40 years, this quaint little house has teetered on a rock in the middle of a river.

What started as a collection of vintage tractors turned into a museum filled with cars, radios, and other oddities.

This 14th century castle withstood years of battle but is now sliding off the hills into the Danube.

This spaceship-like Serbian monument reaches for the stars in celebration of the fallen fighters of fascism.

Two towns are linked by an engineering marvel masquerading as a boring suspension bridge.

Giant topiary dog once played a role in a terrorist bomb plot.

Fighting the British and making game shows for over 150 years.

Stripes of human ashes cover a back lawn in the most sought-after burial grounds in Paris.

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.

France's most famous cemetery, with some of its most curious tombs.

Lady Liberty's original designer installed a little clone in this French fountain.

This one-time health resort was used by aristocrats around the world.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

This Bordeaux parking garage has 712 indoor spaces, and one outdoor.

The world's largest reflecting pool is just two centimeters deep.

Stone age urban planning.

The unusual sculptures are believed to be powerful political symbols.

This statue of a falling man commemorates a teenage martyr of the Hungarian Revolution.

A random tree outside a Budapest hotel has become a DIY shrine to the late singer.

A statue in Budapest's Liberty Square honors the former U.S. president's efforts to end the Cold War.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

This Budapest bar allows drinkers to leave their mark on the walls, floor, and even ceiling.

Niagara Falls holds a special place in Nikola Tesla's history, so they put a statue on it.

A memorial to the tens of thousands of Irish who fled to North America during the Great Famine.