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

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

A park full of outsider art, created by college students studying outsider art.

Over 100 concrete munitions bunkers are all that remain of a Pennsylvanian village seized by the US government.

A park in a small Pennsylvania town is home to an original sculpture by one of its native sons, legendary artist and activist Keith Haring.

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

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

This beloved marketplace mascot poops money and grants good luck.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

The headquarters of the Fraternitas Rosae Crucis, complete with Rosicrucian pyramids, all in the Pennsylvania woods.

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

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

A failed piece of Orientalism has become the proud symbol of a community.

The famous bell was secreted away and hidden in a church in Allentown during the British occupation of Philadelphia.

One of the first commercially successful anthracite-powered iron-making operations in North America.

This strange, big-tailed beast became a Pennsylvania town's unofficial mascot.

Mysterious rocks that ring musically when struck.

Buildings that dynamite couldn't bring down were abandoned because of bathroom issues.

A train station that was abandoned by the coal industry and was later converted into a cocktail bar.

This park contains a number of standing stones meant to heal and inspire.

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

The internal railway of one of the biggest steel plants in America has been transformed into a linear park with unique industrial views.

An indoor miniature village and labor of love for Laurence Geiringer, a model railroad enthusiast.

A mine fire has been burning under the deserted town since 1962, but this church is still going strong.