This collection of vintage signs reflects the long and colorful history of this Arizona town.

Roman ruins top white travertine terraces formed by ancient hot springs.

A sacred lake composed of over 300 separate pools of highly concentrated minerals.

This vertical pinnacle in China was the inspiration for the floating mountains in the movie “Avatar.”

This odd Chilean waterfall-cano hotel must be entered via a rope bridge.

An explosion of natural color known as "the river that ran away from paradise."

An alien landscape of chalk-rock in the Egyptian desert.

A faux desert landscape in the middle of the jungle that sprouts oases during the rainy season.

Mother Nature outdoes herself with this stunningly beautiful set of caves carved into marble.

A salty red wasteland in Tanzania is a breeding spot for endangered flamingos.

After witnessing the rise and fall of three empires, this ancient city was finally destroyed by a series of earthquakes.

This mysterious church sits discreetly above the Aude countryside, right in the heart of "Grail Country."

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

A tiny nondenominational church harkens back to the days of the first homesteaders in the region.

Winter and summer solstice aligned sculpture in the middle of nowhere.

Under the right conditions, rocks will move across this dry lakebed, leaving trails behind them.

The translucent turquoise hue of these natural swimming pools comes from a high concentration of minerals.

Led Zeppelin wrote some of their most iconic songs at this little 18th-century Welsh cottage.

One man's ambition created this psychedelic log home.

A former smithy turned cultural hub with the capital's largest mural space.

The ruins of what is considered the world's oldest university.

A crash site in the heart of polar bear territory has become a beloved local landmark.

A unique collection of old miners' cave homes carved in to the hillside cliffs near Death Valley.

This unreal Portuguese palace looks as though it's made from a pile of different castles.