A tradition unlike any other, this marks the site of the annual Groundhog's Day tradition.

This dramatic rail curve was once the target of a failed Nazi attack.

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

The highest point in Delaware is located under a trailer so this marker across the street will have to do.

A scenic fort on the harbor protected Philadelphia from an attack that never came.

What began as an art installation is now the private drinkhaüs for a brewery's employees.

Museum houses an impressive display of the origin and artistry from the now-quaint invention's history.

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

The rusting remains are visible sticking out of the waters of the Delaware Bay.

This disastrous New Jersey safari park saw animal attacks, escapes, and disease before being abandoned.

The only remaining piece of hull of the most decorated US ship of WWII is this giant name plate.

This massive boulder is either a unique rock formation created by glacial melt or a magic energy vortex.

The boulder on which Alexander Hamilton laid his head after a deadly duel can still be visited on the New Jersey coast.

The remains of a 19th century spring, and the site of an infamous unsolved murder.

Historic town settled in the 19th century because of its convenient location along a popular coal transport route.

On the Hudson resides one of the largest clocks in the world.

Hidden in plain sight on the Hudson River is an abandoned train station where nature has taken over.

World Trade Center memorial likened to a woman's sexual organ.

A world-class collection of mechanical musical instruments and automata.

Step inside Lucy, the world's largest "elephant."

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

Memorial built in 1922 in remembrance of WWI casualties.

A farm in New Jersey grew a most unusual crop for AT&T's testing purposes.

A historic grist mill and active sluice on the Black River.