Legend says train robbers stashed their gold within the depths of this unusual cave.

This giant steer-skull edifice refuses to die.

This once-booming Gold Rush town is now home to a herd of feral donkeys.

One of the best-preserved ghost towns in Arizona speaks to the difficulties of establishing mining towns in the 19th century American West.

An eerie smiling woman looms above the granite tombstones.

More than a century after her death, Little Gracie Watson remains one of Savannah's most often-visited residents.

The modern birthplace of Irish freedom.

A particularly disconcerting tribute to Irish martyrs.

One of Ireland's most infamous prisons for rebels including men, women and children.

Amidst the bustling streets of Dublin, there is a hushed garden that is dedicated to "All those who gave their lives in the cause of Irish Freedom."

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Look closely and you’ll notice that the color changes a third of the way up the tower.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

Despite a recent paint job, the factory still sits empty.

On the outskirts of a reborn ghost town, a decaying post office remembers the bad old days.

A Wild West jailhouse that slid down the mountainside.

Inside this store, a mysterious statue draws visitors from the world over.

Some of the tallest ancient American ruins continue to inspire awe and curiosity.

At an isolated roadside rest area stands a monument marking where famous Western star Tom Mix died in 1940.

Hike amid the palm trees that thrive among Southern California's Indio Hills.

Religious statues built because of one man's bargain with God fill this peaceful sculpture garden.

During World War II this was the site of an "honor camp" used as a prison for draft dodgers, Native American conscientious objectors, and Japanese-Americans—including a man who brought his case against the camp to the Supreme Court.

This memorial pyramid marker honors one of the United States Government's first official camel riders.

Hidden on a cattle ranch in Arizona, this bookstore has been celebrating Southwest literature for more than 40 years.