These sub-farmland caves are home to a majestic stalactite known as the "Crystal King."

Small, privately owned island divided between Michigan and Ohio with abandoned vacation homes and a derelict lighthouse.

A living maritime paradox still floats in the same lake where it was built and resurrected... or was it?

"You can only scalp a customer once, but you can give him a haircut every two weeks"-Barber's Maxim.

The world's tallest doric column is this Ohio monument to a naval victory in the War of 1812.

Eons ago, a rushing lava river formed this pristine passage through solid rock.

A Wild West jailhouse that slid down the mountainside.

A museum and tribute to a brave profession.

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

America's only nuclear missile silo open to the public.

The world's largest military aircraft cemetery.

This southwestern historic site was designed and built by an artist who wanted his work to "feel at home."

Take a drunken tour inside the world's largest known geode.

Berkeley Hot Springs presents to you "the only outdoor monument to presidential bathing."

An abandoned asylum incorporated into a college campus.

An abandoned stretch of highway, deteriorating next to the operational one.

A particularly creepy abandoned hospital that sparks interest for lovers of the supernatural.

Medical history museum featuring a lovely doctor's office from the 1800s.

The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

Deep scars on the earth left by the Ice Age.

Beyond the usual stories that attend old prisons, this one has deep bloody undercurrents.