A Roman-style column in Oregon hides a spiral staircase inside.

While it is not equipped to peer into outer space this observatory looks like it was built on the moon.

Where Nor'easters go to die.

This charmingly homemade amusement park has been growing for 40 years.

Meant to be one of the most extravagant hotels in the world, now an eerie, abandoned architectural gem in Mexico City.

A nearly abandoned 19th-century town on the Palouse.

An abandoned 19th-century hospital now swirling in ghost stories.

A heavenly experience, right here on Terra Firma.

Franciscan monks created a facsimile of the Holy Land for North Americans who couldn’t afford the trip overseas.

This abandoned amusement park was built on a site with a dark history.

The first declared National Monument in the United States.

A beautiful 62-acre Catholic shrine and botanical garden.

The oldest cemetery in New Orleans, resting peacefully for over 200 years now.

The United States Capitol's former columns still stand.

A toxic ghost town sitting atop a massive coal fire.

A collection of oddities including Dr. Kevorkian's suicide device, the Thanatron.

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

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

Try not to get slimed in Tribeca.

Remants of foundations, streets, and streetcar tracks inhabit the cliffs where a landslide occurred in 1929.

A 140-year-old castle with underground caves hidden in San Francisco.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

A crumbling hospital from the 1850s on Roosevelt Island.

World's first "penitentiary," meant to be humane, drove men insane.