The legendary building that needed ghostly approval before being built.

Non-profit time travel mart sells goods you would need for a trip through the fourth dimension.

Originally meant to hold a statue of King William IV, this support sat empty for years. Today, it hosts a rotating cast of public artwork.

While the U.S. and Soviet Union were engaged in a space race, Poland built a UFO on the ground.

This floating sculpture of ice is a poignant reminder of nature's power.

The walls and streets of the ancient city are peppered with penises.

The colorful, smiling concrete silos of Vancouver.

A pixel art killer whale is frozen mid-leap in this Vancouver square.

A working steam clock, one of only a few in the world, located in Vancouver's Victorian Gastown.

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

A quiet, semi-secret square with statues of Mahatma Gandhi, Virginia Woolf, and a conscientious objectors stone.

A statue of the legendary Celtic warrior queen who fought the Roman invaders stands in one of the cities she once destroyed.

This pub was 238 years old when it decided to revamp its image: It started serving Thai food.

The pioneer of psychoanalysis spent the final year of his life here, still seeing patients on that famous couch.

Catacombs turned marketplace.

This 1920s Dutch barge is now a floating bookstore.

Eighty million natural history specimens call this gargantuan museum home.

Visiting this café is like visiting the Austrian grandma you wish you had.

Built to give thanks for the passing of a plague epidemic, this cathedral is a one-of-a-kind architectural hybrid.

The final resting place for the remains of 143 Habsburg royalty.

Brightly colored 30-foot-tall totems light up the desert sky just outside Las Vegas.

An old California photo stand has been turned into a shrine to the cozy art of crochet.

The inverted pyramid design of this station stands out amid Bratislava's urban landscape.

This massive wooden building contains a giant Buddha, healing pillars, and tame deer wandering the grounds.