Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

Eighty million natural history specimens call this gargantuan museum home.

A museum dedicated to the history and exploration of both popular music and science fiction.

A wall of chewing gum moonlights as collective art.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

The first public building in Savannah to offer air conditioning was a luxurious cinema that still operates today.

A statue honoring 44 continuous years of greeting passing ships.

A sweet symbol marks the place where torturous executions were once carried out.

The "plyscraper" is the world's tallest building made predominantly out of wood.

The colorful, smiling concrete silos of Vancouver.

At just six feet two inches deep, it is said by Guiness and Ripley to be the world’s narrowest freestanding office building.

This conservatory allows a little bit of the tropics to thrive in the middle of a major Canadian city.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

Five candy-colored villages on the Italian Riviera.

These medieval skyscrapers dominate the skyline of this small Tuscan town.

Two stone columns flank the grand Venice square, but there were supposed to be three.

Go inside to really appreciate this 500-year-old technological masterpiece.

The only museum with its curator—and her pets—buried inside.

Venice's island of the dead.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

The celebrated eyesore created by starry-eyed sweethearts.

Originally used to sell brandy, the bull-shaped billboard became an iconic symbol of Spain.

Over two centuries old and counting, Madrid's massive botanical garden contains one of Europe's only desert environments.