"Not too many people can say they've had a nuclear bomb dropped on them, not too many would want to." — Walter Gregg.

Ruins of an American Civil War iron forge still survive today.

These beautiful ruins deep in the Pennsylvania woods are thought to have been a ski lodge or a speakeasy, but no one really knows.

This wondrous waterfall rushing down a green-covered mountain wasn't discovered until 2010.

One of the largest-ever mental hospitals now sits abandoned, surrounded by 25,000 unmarked graves.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

During prohibition, corrupt city officials ran drinking dens under the streets of Downtown Los Angeles.

Ghost Town in the Demilitarized Zone of the Golan Heights.

Underwater restaurant at the coral reefs of Eilat.

This unique exhibit "Dialogue in the Dark" reverses roles as the visionless become guides and the sighted become ‘blind.’

This family tattoo parlor has been inking religious pilgrims in the Middle East for 700 years.

This "Jewish Sistine Chapel" was designed to reinvigorate Judaism's artistic legacy but was almost lost to misguided restoration.

These numerous Israeli caves were dug out over hundreds years for reasons ranging from hideouts to burial sites.

A striking 12th-century-style castle built on the edge of a cliff.

It's always summer at the beach inside this former airship hangar.

The world's oldest rose is so tough it survived being bombed in World War II.

The oldest Jewish cemetery in Europe survived Hitler's Germany.

The birthplace of an eccentric alchemist and possible inspiration for the fictional reanimator of monsters.

The largest free-standing aquarium in the world resides in a hotel lobby in Berlin.

Started as a kitchen garden, now the second largest botanical garden in the world.

What was once the largest NFL stadium.

Hundreds of hopeful gold miners came here to get rich, but only two years later the small town was deserted.

A dilapidated psychiatric facility on the outskirts of Milan where electroconvulsive therapy was developed and Napoleon once lived.

Ghost stories surrounded this “castle,” the only structure from a huge mansion that was never built.