An abandoned Jazz Age dream home and con man's hideout in Death Valley.

This naturally heated mountainous creek has created a group of neon blue pools of potentially deadly boiling water.

A natural swimming hole that was once a ceremonial center for Mayan priests.

Sparkling, calcite-covered skeletons of children who may have been sacrificed to appease an angry god.

Preserved Inca city and site of the last Inca stronghold against the Spanish conquistadors.

An encyclopedic collection of mammal penises.

This boat represents the promise of undiscovered territory, a dream of hope, and progress and freedom for Iceland.

This black church sits alone among a field of lava rock.

This natural Icelandic fissure allows divers to swim right between two volatile tectonic plates.

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

This valley of hot springs and boiling mud pots is home to the record-holding "Geysir," which originated the English word.

This eye-popping Icelandic crater lake is surrounded by red volcanic rock.

A unique geological area spiked with wind-carved rocks that resemble teepees.

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.

The 7,000-year-old calcium carbonate formation creates a magnificent natural bridge.

It’s hard to believe this hostile landscape was once a health resort.

A natural formation that resembles a camel resting in the New Mexico desert.

An antique narrow gauge railway line still running through the Colorado and New Mexico mountains.

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

Climb to the top of this spiritual tower, and you'll be rewarded with spectacular views.

When ecosystems collide in the arid Southwest.

Check out a hidden collection of vintage neon signs.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.