This Boy Scout retreat acted as "Friday the 13th"'s original Camp Crystal Lake.

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

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.

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

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

The graffitied ruins stand hidden within the Pennsylvania woods.

A field of nothing but boulders which resembles a giant's gravel driveway.

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

Mysterious rocks that ring musically when struck.

A once-booming Mississippi River town with a history of racial violence is now eerie and mostly abandoned.

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

An abandoned Victorian-era amusement park is rusting away amidst luxury houses.

A hidden network of subterranean passageways lies tangled beneath Indianapolis' bustling City Market.

Once a speakeasy operated by Al Capone, this Milwaukee cigar bar is now a haven for ghost hunters.

When the Austin Dam failed it destroyed much of Austin...and then it failed again.

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

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

In the bowels of a 19th-century brewery lurks a fine-dining restaurant offering an array of themed feasts.

A toxic ghost town sitting atop a massive coal fire.

Narrow gorges and deep pools created by long-ago glaciers.