An eerie, decaying ghost town destined to fade into the forest.

This free, take-a-book shop seems like a trick but isn't.

Crammed into a Baltimore row house is an oddities shop that sells everything from skulls to dead insects.

Eighteen miniature death-scene dioramas.

Nothing says indulgence like a 1,500-pound chocolate castle.

A hidden piece of Altoona's railroad history in a long-forgotten abandoned town.

What looks like a simple quaint estate in rural Pennsylvania was in the 18th century home to a small monastic community.

This forgotten building was one of the few Philadelphia-area breweries to survive Prohibition.

This icon of the Atomic Age now lays dormant.

A rock maze opens up to a panoramic viewpoint at an abandoned mine full of ghost stories.

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

These lush botanical gardens employ the most purrfect pest control force.

Contrary to what one might expect, ice forms inside this small cavern during the summer and melts during the winter.

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

This Pennsylvania cave holds evidence of the oldest known inhabitants of North America.

This semi-spooky remnant of an abandoned hotel provides fantastic views.

One man's real life disfigurement inspired a lasting local legend surrounding an eerie tunnel.

This secluded walking trail is a hidden gem of a Pittsburgh park.

Board a mine car and descend the #190 slope 300 feet underground into the Clark Vein of coal.

These disused steel furnaces are now haunting ruins that may one day be a national park.

It would take 35 firetrucks to fill this enormous glacial pothole.

This restaurant offers a side of antiques, curios, and a bathroom chock full of owls.

A historic covered bridge is but one example of an oddly prevalent American urban legend.

This Philly landmark has a giant butterfly pavilion, three floors of insect displays, and withstood a $40,000 heist.