The once forbidden "secret cabinet" of erotic art from excavations of Pompeii and Herculaneum.

The world's toughest modern Christian pilgrimage leads directly to the gates of Hell.

A sacred well steeped in Pagan roots on the West Coast of Ireland.

An ancient holy well said to be used by the patron saint of sailors and travelers, lost in the boggy west of Valentia Island.

A hard-to-reach oasis in a desolate corner of Death Valley National Park.

This Yellowstone geyser may not shoot as high as the nearby Old Faithful, but it erupts for considerably longer.

Where serial killer Aileen Wuornos drank her last beer.

Twice a year, visitors can tour the desolate site that birthed the Atomic Age.

Soaring over 6,000 feet in the Bavarian Alps, this beer garden was once Hitler's 50th birthday present.

Earth's greatest purely vertical drop at 4,101 feet.

A once popular resort—said to be the vacation spot of gangster Al Capone—now remains abandoned in the woods of Arizona.

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

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

The shattered remnants of a meteor that struck Santa Fe more than a billion years ago.

Its history includes dinosaur fossils, cattle rustlers, Georgia O'Keeffe, and a mythical giant rattlesnake named Vivaron.

More than 21,000 images fill this overlooked gem of a prehistoric site.

Twenty-seven massive radio antennas on the high plains of New Mexico search for life on other planets.

The official atomic museum of the United States explores the explosive and productive history of a much maligned energy source.

A cave's rare beauty held a cavernous secret hidden underground.

These aggressively sustainable art homes look like something out of 1970's science fiction.

Legends surround this jagged rock formation in the New Mexico desert.

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

Hidden within a spa in a Texas strip mall is a restaurant specializing in Eastern European foods.

The final resting place of infamous outlaw Clyde and Marvin Barrow.