The legendary building that needed ghostly approval before being built.

The abandoned zoo enclosures offer a perfect place to experience the other side of the bars.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

It should come as no surprise that the best view of the Hollywood sign is from Batman's lair.

The final resting place of the controversial chess champion.

A heavenly experience, right here on Terra Firma.

These old stone ruins in the Oregon wilderness were once bathrooms and are steeped in legends of murder.

The seamy, underground secrets of Portland's criminal past.

The former Nazi Germany concentration camp stands as a museum to remember this dark chapter in European history.

The site of Billy the Kid’s most famous escape and the end to the Lincoln County War.

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.

A multi-storied adobe complex has been inhabited for more than a thousand years.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

An oddly conical beacon perched atop beautiful Irish cliffs.

A statue in the center of Dublin dedicated to one of their favorite sons of rock & roll.

This modest plaza in Moneygall, Ireland has cashed in on its distant connection to the U.S. president.

The comedy and tragedy of Oscar Wilde is preserved in a Dublin park, captured in a sculpture of colorful stone.

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

The true age of this ancient stone circle is unknown, but its stunning vista isn't in question.

A six-ton wedding present for the King of the Scots.

The most loyal of little dogs, or a Victorian era publicity stunt?

A proud bronze billy stands as an eternal symbol of Ireland's oldest festival, where a goat is made king.