The world's largest wooden structure.

This whimsical fountain pays tribute to Toronto's four-legged friends.

This underground church is topped with a 500-foot cross that is seen by many as a beacon of fascist hubris.

A maze of crosses marks the jumbled divide between the Netherlands and Belgium.

It appears as if a man is standing behind this giant airport clock, painting the hands in real time.

From Coke II to Google Glass, this exhibit features some of the most spectacular commercial flops.

This German monument honors the so-called "Prince of Mathematicians."

Bursting forth from a historic German neighborhood, these day-glo palaces are now a bright fixture in the town.

In Faroese legend, this sinister horse-shaped beast lures unsuspecting passersby only to drown them in the lake.

This mysterious, medieval cathedral remains unbuilt but fiercely protected.

This unusual building straddles two countries.

Cat art as far as the eye can see.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

Love, knishes, and best wishes from this legendary Lower East Side bakery.

Yes, this monument is aware that it is about 20 miles away from the actual center of the United States.

Dozens of musicians have planted trees in this Danish park, and donated songs to go with them.

This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

The yawning maw of this pagan visage is said to bite off the hands of liars.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

A renegade art installation in a small Vancouver park is now officially sanctioned by the City Parks Department.

The original home of the Lego has a huge amusement park dedicated to the iconic plastic toy.

This little replica of Lady Liberty provides a bit of NYC in a Japanese city.

A magical place that lets you play in and explore the world of Studio Ghibli.

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