A religious-themed park filled with folk art to bring biblical stories to life that fell into disrepair and now being restored.

The oldest bar in Missouri is hidden within a limestone brewery cellar more than 50 feet underground.

This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

Palatial mansion estate used in films including "Flowers in the Attic" and "The Witches of Eastwick."

A walk through the historic city center, under the streets of Seattle.

Ruins of the elaborate house where the enigmatic costume designer threw glamorous parties for New York's theatrical elite.

The largest and most well-preserved petroglyph site in the Verde Valley.

This rugged area of red rocks and arches is often considered one of the most beautiful places on Earth.

Home of a 28-foot tall stalagmite known as the War Club.

An abandoned railroad tunnel forgotten by time awaits inquisitive hikers.

This mysterious twin turboprop Grumman G-159 covered in graffiti has spent a decade and a half abandoned.

A small canyon with petroglyphs and a seasonal waterfall, only a short hike from the remnants of old Route 66.

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

Other-worldly rock formations and ancient fossils abound in this unique stretch of Nebraska badlands.

A magical sinkhole on the Yucatán Peninsula is adorned with mini waterfalls and hanging vines.

A clear blue swimming hole with hidden caves, still unexplored.

This Route 66 classic sports a giant fiberglass rabbit that you can ride.

A well-preserved Ancestral Puebloan ruin tucked beneath a desert cliff.

A working cattle ranch with remarkably well-preserved prehistoric petroglyphs and ancient ruins.

This 40-room dwelling tucked within a cliff was built by the basin's prehistoric residents.

Death road of Bolivia.

The terrified face of Henry Wells is etched on this garret window.

Orr Park's dead trees have been carved into a menagerie of whimsical visages.