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

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

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

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

This lush forest valley was once mined for lumber to the extent that it was once nicknamed "The Pennsylvania Desert."

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

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

The remains of a community that was forced to move for a dam that never materialized still rot in this Pennsylvania park.

A train station that was abandoned by the coal industry and converted into a cocktail bar. Now it’s home to the local visitor bureau.

Yo, Adrian!

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

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

This eerily well-preserved coal town was saved from destruction by a Sean Connery movie.

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

A toxic ghost town sitting atop a massive coal fire.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

This mill has been in continuous operation since before the country’s founding.