When Croatia became independent of Yugoslavia, the splintering governments left behind these concrete tunnels.

A fortified city, home to a remaining population of five families

World's largest film studio, where visitors tour the decaying sets that litter the harsh desert environment.

The world's largest concentrated solar power plant.

This amazing oasis of art and plants is hidden on the outskirts of Marrakesh.

The largest cactus farm in Africa.

Numerous impressive carvings are embedded in the trees lining this street in Marrakech.

The oldest monument in Marrakesh and the city's only surviving example of Almoravid architecture.

Fortune tellers, snake charmers, poets, and storytellers all gather on this historic square in Morocco.

Deliberately hidden for centuries, the magnificent Saadian Tombs were eventually uncovered in 1917.

Odd outsider art installations surround a Gold Rush-era ghost town.

The most magnificent bottle house in a town strangely full of them.

A land of debatable treasure.

If you want to take a peek at Area 51, this is legally as close as you're going to get.

In the middle of an extremely unforgiving and desolate high desert is the most secret military facility in the world.

A picture-perfect town, perfect for blowing up.

Potential high level nuclear waste storage site for the next 10,000 years and beyond.

Large tower used for simulating radiation of Hiroshima bomb and the tallest object ever relocated.

The contents of this safe survived a 37-kiloton nuclear bomb.

All of the 20 occupied houses in this mostly abandoned town feature some curious display of junk art.

Nearly 300,000 acres of wildlife, natural splendor, and a hidden ghost town have been designated a national monument.

This former Mormon settlement is reemerging from the receding waters of Lake Mead.

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

The drama of nature in full effect in this Nevada State Park.