The graffitied ruins stand hidden within the Pennsylvania woods.

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

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

Abraham Lincoln's vice president took his last breath here on July 4, 1891.

The whole of Maine's history with the salty little fish is packed into this tiny coastal museum.

Why have you never heard of the second most popular tourist site in New York?

This Art Deco fortress in upstate New York gives Manhattan's vaunted examples of the style a run for their money.

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.

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

This secluded walking trail is a hidden gem of a Pittsburgh park.

There aren't too many operational funiculars around, but Pittsburgh has two!

One of the steepest streets in the United States makes an intriguing challenge for cyclists.

Faces carved into the cliffs create an otherworldly walking trail.

A throwback train ride transports passengers through one of the lesser-known national parks in the country.

Medical history museum featuring a lovely doctor's office from the 1800s.

A miniature world of concrete and stone in Springfield, Ohio.

Where one of the worst train disasters in the country took place, leading to upgrades in rail safety.

This vessel is believed to be the oldest operating fireboat in the world.

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

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

An abandoned tuberculosis hospital moulders on into an uncertain future.

This museum pays tribute to the largest group in the Iroquois Confederacy.

This exoskeleton was gifted to Rutgers University by Japan for its role in educating some of the first Japanese citizens to study outside the country.