With a floor made of thick glass, this observation deck offers a full view of Sunwapta Valley's mountains and rivers.

This Niagara Falls tourist trap is a world bright with neon and curiosities that will inspire love, hate, or a mixture of both.

Soaring over the Niagara Whirlpool since 1916.

A tunnel that brings more than a century of history to life from the deepest parts of the Niagara Gorge.

An interactive museum-like experience takes visitors back to 1980s Communist Bulgaria.

A spherical "micro-nation" in the heart of Vienna.

Op-art architecture designed for happiness.

Beautiful Austrian natural history museum with carved ceilings and row after row of ancient taxidermy.

Baroque celebration of the end of the Great Plague of Vienna.

A silly medieval mural preserved on the side of a Viennese house.

A neo-Gothic church built to thank God for saving the Emperor of Austria from an assassination.

Eastern Bloc nostalgia, anybody?

This Slovakian statue of an emerging sewer worker might just be a bronze peeping tom.

This Slovak bridge is known both for its connection to a national uprising and its UFO-shaped eatery.

According to the local legend, these boys and ducks were turned to stone by an angered water goblin.

Housed in a former air raid shelter, this museum is dedicated to the history of computing and video games.

Along the edge of this fountain are 365 smaller fountains that represent the days of the year.

An ode to a soldier who came to town, fell in love, then began making his own sparkling wine.

A small sculpture that pays homage to the famous bronze ear of Ca de l'Oreggia—or does it?

Third time's a charm, or in this case, two testicles are.

See what remains of a once grand ancient Roman circus.

The mark of the Devil's horns on a marble column in Milan.

This grisly effigy displays an early Christian martyr who was skinned alive and beheaded.

This poignant art installation raises awareness of violence against women.