Memorial built in 1922 in remembrance of WWI casualties.

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

A bronze plaque at an intersection in Hoboken marks the place where the game of baseball first took shape.

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

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

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

Where the embers of the Big Bang were first detected.

Edison's cast-in-place concrete houses were a failure, but way ahead of their time.

The final resting place of one of the United States's greatest poets.

A giant light 13 feet high shines near Thomas Edison's old Menlo Park lab.

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

This tiny structure was built by the creator of the Brooklyn Bridge.

The boulder on which Alexander Hamilton laid his head as he died can still be visited on the New Jersey coast.

Once the world's largest reinforced concrete structure, this abandoned bridge now beckons urban explorers.

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

One of the world's largest model railroads is a mind-boggling achievement.

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

The creek where a shark wreaked terror upon New Jersey, and served as the inspiration for "Jaws."

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

The site of one of history's most indelible and horrific tragedies.

Once in a state of dilapidation, this candy-inspired fortress is now being revived.

Decommissioned NYC subway cars are dumped into the ocean to create this underwater wildlife habitat.

In 1787, a group of delegates met at this very spot to drink, be merry, and ratify the Constitution of the United States.

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