Most-visited and most-photographed slot canyon in the American Southwest.

One of the largest, oldest, darkest, quietest motel rooms in the world.

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

This historic national park is covered in the stunning ruins of red rock pueblos.

The eroded core of an ancient volcano is now accessible by a short hike.

A strange mishmash of ruins and abandoned structures hint at the park's many lives.

Inscriptions found in the Majella mountains reveal stories of resistance and rebellion after the unification of Italy.

The remains of this rugged homestead ranch offer a brief glimpse into a bygone era.

A two-hour hike in the Orfento Valley leads to the remote ruins.

The discovery of this Neolithic settlement, which contained a Stone Age "cathedral," threw archaeologists for a loop.

The mystery of this small, brick pond eluded its possibly only investigator until his death.

While exploring the desert, you can stop by the home of a fictional heretic from a parallel universe.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

With nearly double the depth of the Grand Canyon, this Peruvian canyon is one of the deepest in the world.

Secret Manor, a house full of legends, the least of which is the haunting of long-deceased ladies of pleasure.

A nondescript building that's been functioning as a speakeasy for nearly a century and a half.

This lesser known Hearst estate is a fairytale village built from the stolen bones of historic European buildings.

Sunset-colored dunes of volcanic ash make taking a poor photo impossible.

More stones than Stonehenge, all scattered within a windswept landscape sure to enchant 'Outlander' fans.

Once-buried markers show England’s lowest land point keeps getting lower.

This fireplace-turned-monument pays tribute to the assassinated U.S. president.

Hike the unusual hoodoos and rock formations that form this little-known natural wonder.

The remote resting place of a notorious Wild West outlaw whose death is shrouded in mystery.

North Carolina's only restored fort from the French and Indian War.