This giant temperature attraction created some giant electric bills.

Preserving the remains of Native American cultures which otherwise would have been submerged behind Hoover Dam.

Experience a charming 1930s version of "infotainment."

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.

James Turrell's total color immersion art installation, hidden on the top floor of a luxury handbag shop.

A giant open-air sculpture made of over 200 full-sized boats.

An exotic wildlife habitat right off The Strip.

One of the world's tallest Ferris wheels takes visitors high above Las Vegas in a spinning party room.

Singapore's landscaping project is home to 18 incredible Supertrees.

The most playful of the life-sized statues that make up Singapore's "People of the River."

The "Fun Spot of the Desert" is now a haunting ruin, and a reminder that putting a water park in a desert is a bad idea.

A desert ghost town—occupied for only 12 years—was once home to more than 500 silver mines.

Decommissioned experimental solar facilities that pioneered solar energy technology.

In the days before HD projectors and IMAX, some of the most powerful projectors belonged to planetariums.

Hundreds of trees made from glass bottles make up this forest on Route 66.

Watch the newest land on the planet form before your eyes.

Doris Duke's lasting collection of Islamic Art, hidden in a Hawaiian paradise.

During the solar phenomenon "Lahaina Noon" this bendy, curvy sculpture forms a perfectly circular shadow on the ground.

The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.

The once highest point in China blends symbolic design with a kick of adrenaline.

An out-of-place slice of France, smack in the middle of Shanghai.

A giant scale model giving a sneak peek at what urban planners see for Shanghai by 2020.

This probably wasn't what Mao had in mind.