A quiet, gothic haven nestled between Pittsburgh's Squirrel Hill and Point Breeze neighborhoods.

Pennsylvanian mass grave and possibly mass murder.

A macabre farm reserved part of its 222-acres for dead bodies, all in the name of science.

The remains of a community that was forced to move for a dam that never materialized still rot in this Pennsylvania park.

The oldest farmer's market in America is so ancient it was approved by the King of England.

This meticulously extracted nervous system allegedly came from a 19th-century custodian who donated her body to science.

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

This might just be the TARDIS of bookstores.

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

The origin of this mechanical boy was a mystery until he revealed his maker by writing it in perfect cursive.

Mutant vegetables, transgenic mosquitos, and atomic rodents span the walls of this one-of-a-kind museum.

A beautiful oddities shop crammed with strange and morbid curiosities.

This permanent exhibition celebrates the finest of our heartless automatons both real and fictional.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

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

Hundreds of glow-in-the-dark objects light up a museum in a historic zinc mine.

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

A collection of oddities including Dr. Kevorkian's suicide device, the Thanatron.

With some 500,000 books across five buildings, this bookstore is a reader's paradise.

Underground tunnels remain beneath this abandoned mental asylum.

A miniature village lies nearly forgotten in the forest by the side of a major highway.

This abandoned psychiatric hospital once housed more than 4,000 patients in the middle of a quaint New England town.

In which a local geological marvel becomes a quaint roadside attraction.

These tourist trap caverns are said to be the former home of a legendary Pennsylvania Hermit.