Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

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

A picture-perfect town, perfect for blowing up.

A Victorian mansion, painstakingly reproduced to appear just as the the Munster's family home did on TV.

Decaying military base deactivated in the 70s is now visited by urban explorers and military enthusiasts.

Island ghost town detailing Flagler's folly in building the Overseas Railroad.

Where Nor'easters go to die.

The magic's in the hole!

Shoreline strewn with the remains of ghostly fallen trees.

The hidden jewel of Disneyland: a members only playground for the Disney elite.

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

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

Deadly airliner crash preserved for those willing to climb and pay respects.

A piece of outsider public art accompanied by a strange urban legend.

Scale replica of China's ancient terracotta tomb warriors and Forbidden City are the side project of an eccentric millionaire.

Three hundred years of preserved Spanish colonial history in San Antonio.

Life's work of sculptor Elisabet Ney remains preserved in her last studio.

An enormous pink granite batholith, long attributed with spiritual powers by the Tonkawa Indians.

A recreated Stonehenge stands in a country field, complete with Easter Island moai heads standing as sentries.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

An emerald-green grotto just a short trip from Austin.

Abandoned railroad tunnel is home to a colony of three million Mexican free-tail bats.

Ruins of a once-opulent grand Victorian resort.

This museum showcases the history and contributions of the U.S. Army to the medical industry, both on the battlefield and off.