From economic backbone of a community to deadly diving hole, these former stone quarries are now a park for rock climbers and graffiti artists.

Beautiful steampunk ghosts of early Massachusetts.

On a former island, this old fortification once used to protect the Boston Area and started Edgar Allan Poe in his military career.

Radical Bookstore and Community Space.

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

This mysterious artificial cave has long puzzled New Englanders.

This evocatively named natural crevasse was created by a torrent of water that smashed right through a granite deposit.

A collection of full-size movie monsters opened to the public.

Visit a sweet shop selling one of the first candies ever made and sold in America.

A cave dug by a man directed by ghosts to find pirate treasure.

Experience the hysteria of a 17th century witch hunt through goofy reenactments and wax dummies that should probably be burned at the stake.

The only geyser in the state of Pennsylvania is caused by pressure from an abandoned coal mine outside of the ghost town Centralia.

The graffitied ruins stand hidden within the Pennsylvania woods.

An abandoned coal mine reached by a steep hike.

Hikers can still stroll beneath the long conveyer of this abandoned mining facility hidden in a West Virginia river gorge.

One of the oldest used bookstores in the U.S. has been selling antiquarian treasures since 1825.

A more than 260-year-old crypt built on Boston's oldest English burial ground.

This railroad tunnel was once the longest in Massachusetts.

In the middle of a New England forest sit the crumbling ruins of World War II-era ammunition storage bunkers.

No one really knows how these old hobby horses got here, but the herd keeps growing.

The poems Nathaniel Hawthorne and his wife Sophia etched into its windows are still visible today.

This tower pays homage to a legendary Viking fort established in Massachusetts that never really existed.

Once the largest public hospital for the mentally ill was also surrounded by controversy.

This former Masonic hall has been turned into an art project that uses even more metaphysical iconography.