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

This abandoned Poconos resort is haunted by a history of kitschy romance and a violent fugitive.

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

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

Sail through this subterranean show cave that is home to a legend that would go on to name nearly everything around it.

House of vintage taxidermy and Steampunk sculptures in a quiet Pittsburgh neighborhood.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

Mysterious rocks that ring musically when struck.

Philadelphia boasts one of the best — and most often overlooked — traditional Japanese gardens in North America.

Where America's first doomsday cult awaited the end of the world.

A toxic ghost town sitting atop a massive coal fire.

A layered tribute to the work of mosaicist Isaiah Zagar.

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

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

An abandoned stretch of highway, deteriorating next to the operational one.

A modern ghost town whose inhabitants were driven away by the growth of nuclear power.

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

This demolished goliath of American industry once loomed over the depressed town it once made thrive.

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

Collection of trolley cars in the woods represent one man's attempt to preserve transportation history.

A planned settlement in Pennsylvania once housed the aristocratic refugees of the French Revolution.

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

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