This hospital fell into ruins after failing to act as the advocate for the mentally ill it was designed to be.

The final resting place of many of New Jersey's most famous residents, including U.S. history's most in-vogue antagonist, Aaron Burr.

Tucked behind New Jersey's abandoned Gingerbread Castle lie the eerie ruins of a once-flourishing paper mill.

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

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

The graffitied ruins stand hidden within the Pennsylvania woods.

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

This stone tower marks a lookout point over the historic Washington Crossing, and maybe some buried treasure.

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

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

The final resting place of two members of the infamous Doan gang, notorious outlaws and Revolutionary War Loyalists.

A recently abandoned psych ward at the end of Sanatorium Road.

Once the world's largest reinforced concrete structure, this abandoned bridge now beckons urban explorers.

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

Mysterious rocks that ring musically when struck.

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

A "house to which to flee" for settlers in colonial Pennsylvania.

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

Featuring the largest CinemaScope screen in Pennsylvania, this drive-in has entertained moviegoers for more than half a century.