A simple plaque remembers an act of WWI terrorism that obliterated an island and forever scarred the Statue of Liberty.

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

Once America's longest-manned military fort, now an abandoned hulk.

These unassuming lighthouses have seen the first reading of the Pledge of Allegiance, the first wireless transmission, and more than one mystery.

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

Rusting away on the edge of New Jersey are the remains of a Cold War missile launch site.

Vacant Beaux-Arts buildings that serve as reminders of a beach town’s glory days.

WWII-era bunkers are hidden under the beaches of this picturesque park, which is still scattered with wartime watchtowers. .

World War II bunker still standing on the New Jersey beach.

Several times a year, during low tide, two pairs of historic train tracks are revealed on this New Jersey beach.

This Delaware River bridge is emblazoned with a catty slogan from a more prosperous time.

How this Pine Barrens hill got its name is uncertain, but on a good day the view from the fire tower is crystal clear.

Rising out of a clearing in New Jersey's Pine Barrens is an Aztec-inspired monument to the "Lindbergh of Mexico."

Yo, Adrian!

A daily replay of the experiment that proved the rotation of the Earth.

This elaborate towering structure was once famed for its revolutionary height.

This historic iron-working village is now a ghost town so immaculate that it looks as though it was recently built.

In the woods of New Jersey lie the ruins of a munitions village abandoned after World War I and the remnants of a 1920s wooden racetrack.

The Dover International Speedway is home to a towering, concrete-skinned, racecar-hungry behemoth.

The remains of an old sawmill, gristmill and the surrounding industry dating back to the 18th century.