A rare tour of a commercial jet assembly plant, held inside one of the largest buildings in the world.

This sublime architectural marvel is a rare example of an expressionist church.

The Sighignola summit on the Swiss border offers views so breathtaking it's been named one of the most beautiful places in Italy.

The Bourbon royal family had this unique octagonal hunting "cottage" built on a tiny islet in Lake Fusaro.

Futuristic apartment blocks are the backdrop for Montreal surfers hangin' ten on the Habitat '67 standing wave.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

San Francisco's first World's Fair, dedicated to the wonders of California.

A floating McDonald's built for Expo '86 is now a derelict relic on Burrard Inlet.

These two giant boulders mysteriously perched on a 60-foot cliff may have been slung up there by a raging tsunami.

The steepest classic funicular in the world glides along a dizzying incline.

An eerie collection of the surviving structures from a past celebration of the future.

The unique collection includes bronze cast handprints of some of America's most famous astronauts.

This vintage animatronics show is the Vegas version of a walk through the woods.

The roadway bend where highway painters practice their craft looks like expressionist art.

A Swiss board game museum housed inside a picture-perfect castle.

An overlooked monument to the celebrity gangster who helped put the sin in Sin City.

When a massive landslide hit one of the world's tallest dams it created a tragic environmental disaster.

The dramatic upward-curving roof is one of the most iconic examples of Googie architecture that still stands today.

An enormous playhouse designed to look like 21 stacked Lego bricks, with another 25 million colorful Legos inside.

The unedited photograph called "Bliss" has graced the screens of over a billion computers.

Astronomers plan to launch a space telescope into orbit, to find out what exactly stands in the way of an asteroid hitting Earth.

A community of collapsing homes more than a mile out from the Florida coast.

An abandoned water sports stadium that has become a haven for graffiti and decay.

Disney World's very first waterpark is now an abandoned ruin being reclaimed by the swamp.