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

The headquarters in Salem doubles as an occult art gallery.

This home is steeped in history from, George Washington to George Corwin, High Sheriff during the Salem Witch Trials.

A boulder in the Churchyard of Down Cathedral marks the legendary burial place of "The Apostle of Ireland."

One of Ireland's most infamous prisons for rebels including men, women and children.

A small island less than half a mile from Venice is a forbidden island with a dark and twisted past.

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

Charleston's historic city jail once held everyone from pirates to Civil War POWs.

Walk through the actual strap iron cells and solitary chambers of Arizona Territory’s first prison.

The maximum security facility was once thought to have "the bloodiest 47 acres in America."

A historic and oft-filmed prison stands in a Chicago suburb.

This former maximum-security prison is creepy, sobering, and supposedly haunted.

An astounding collection of medical specimens, including bits of President Lincoln.

Beautiful views of the surrounding hills and birds of prey can be found at this sanctuary.

The Home and murder site of the witch of Rehmeyers Hollow.

An FDR-era tuberculosis sanatorium has stood abandoned in the suburbs of the U.S. capital for over 30 years.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

World's largest collection of serial killer artwork and other macabre exhibits.

Jail from the 19th century that was built by inmates.

The ruins of a 19th century shelter run by the Independent Order of Odd Fellows.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

Prison made famous by The Shawshank Redemption has been out of commission since 1990.

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