Run by a eugenics advocate, this aging institution conducted secret radiation experiments sponsored by Quaker Oats.

The inspiration for H.P. Lovecraft's horror stories and Batman's Arkham Asylum is now a condominium complex.

This tiny cluster of abandoned buildings looks like the future of the ghost town - today!

The "Fun Spot of the Desert" is now a haunting ruin, and a reminder that putting a water park in a desert is a bad idea.

Decades after testing the polio vaccine on unwitting patients, this historic mental hospital sits in ruin.

Ruined pieces of stone and a swimming pool are all that remain of an amusement park swept away by a flood.

This abandoned Civil War fortress is slowly being swallowed by the waters of Lake Borgne.

This empty Detroit high school was too expensive to maintain or destroy.

This abandoned prison castle has become an imposing gallery of graffiti art.

A crumbling wizard is one of the final reminders of a roadside Middle Earth.

This Queens hospital has stood abandoned for almost 20 years after its patients were secretly relocated in the dead of night.

This historic New Orleans cemetery is the final resting place of members of the Independent Order of Odd Fellows.

This lovely university observatory continues to sit abandoned since its potential savior was sent to jail for fraud.

Unlike other abandoned asylums this empty institution welcomes visitors, just don't go in the buildings.

The abandoned husk of a mental institution that failed to save a Jazz Age icon still sits nearly unchanged.

This abandoned cemetery is crumbling into ruin, exposing the artifacts and bodies buried there.

The graffiti-covered remnants of a former triangulation station are balanced precariously on this California peak.

What was once one of the country's largest confectionary plants is now an abandoned ruin, but is still pretty sweet.

The ruins of a cotton mill that was burned in the Civil War are still hidden in a Georgia forest.

This huge, disused viaduct is now a crumbling concrete underworld of covered in years of graffiti.

The remains of a failed subway in upstate New York is now an underground graffiti bunker.

The ruins of a Massachusetts prison farm can still be found crumbling the woods of a state park.

One lonely, modern pyramid has gone from corporate think tank to deserted boondoggle.

The second tallest railway trestle bridge in America.