Keshwa chaca, among the last handwoven Incan bridges, crosses Apurimac Canyon in Peru.

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

A mysterious pre-Incan ruin believed to have miraculous healing powers.

Huge stone depressions which may have acted as an Incan agricultural experiment.

All you ever needed or wanted to know about America's favorite whiskey, but not a drop to drink.

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

An emporium for the weird, creepy, rare, and just plain gross.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

Natural sonic phenomenon comes with a grisly legend of murder and blood.

A multi-storied adobe complex has been inhabited for more than a thousand years.

Bizarre lunar-like landscape with thousands of large stone "hoodoos."

The first declared National Monument in the United States.

Community owned and operated, this property is home to a diverse set of nudists.

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

This naturally-sourced hot spring is now home to a clothing-optional resort.

The highest bridge in America was built for an almost unnervingly small amount of money.

“You better take care of me Lord, if you don't you're gonna have me on your hands.” ― Hunter S. Thompson, Fear and Loathing in Las Vegas.

An architect in Aspen used psychedelics as his muse while building this mushroom masterpiece.

The world's brightest bioluminescent bay.