This historic covered bridge contains a series of macabre paintings that communicate one thing: everyone dies.

World's first "penitentiary," meant to be humane, drove men insane.

The last of Philadelphia's wood-paved streets is now a landmark of terrible engineering.

The name of this famed hospital was once a byword for the horrors of medical and psychiatric care.

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

This little-known collection holds everything from "Dracula" notes, to the manuscript of "Ulysses," to the forged works of Shakespeare.

The alpine falls where Sherlock Holmes apparently met his demise can actually be visited.

Northern Ireland's Brobdingnagian stepping stones.

The private clubhouse for the members of the Academy of Magical Arts.

A collection of haunted artifacts chronicles the career of the world's most famous paranormal investigators.

Pennsylvanian mass grave and possibly mass murder.

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

Hellam Township is reputed to feature seven remote gates, which when passed through in the right order, open an entrance to hell.

A special shop catering to the needs of things that go bump in the night, and also helps kids become writers.

A church that bred legends, and served as an inspiration for the Da Vinci Code.

Ant sculptures march up the side of what used to be an iconic spot in punk rock lore.

A magnificent Victorian garden that brings the charm and style of old-time aristocracy to the 21st century public.

In the early 1800s, surgery was also a show.

Obelisks and stone pineapples in the Irish countryside.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

This hospital fell into ruins after failing to act as the advocate for the mentally ill it was designed to be.

A world-class collection of mechanical musical instruments and automata.

Collect holy water from a Bronx grotto.