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

Where the embers of the Big Bang were first detected.

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

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

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

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

Hidden deep within New Jersey Pine Barrens is a massive graffiti wonderland.

Tucked behind New Jersey's abandoned Gingerbread Castle lie the eerie ruins of a once-flourishing paper mill.

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

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

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

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

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

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

Along the Palisades skyline are the ruins of a large mansion built in 1911 and demolished in the 1930s.

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

The remains of a century-old mansion that met a fiery demise years after it was deserted.

This tiny New Jersey village has lived many lives but seems determined to remain a ghost town.

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

This Dutch Colonial home is the oldest remaining farmhouse in Manhattan.

A little lighthouse in New York City, surrounded by mysterious stories of insanity-driven construction.

This small, hidden cove is home to abandoned boats.

There must be a pun in this haystack somewhere...

This outdoor gallery of graffiti-covered walls pays homage to the past, present, and possible future of street art.