A tree that grows parallel to the ground was declared Brooklyn's "crowning curio" by the poet who saved it.

Oldest surviving example of a Dutch saltbox frame house in America.

Con Edison’s exotic and heat-loving pests.

A once-groundbreaking power plant turned into a hotel and mini-museum of archeological and geological wonders.

This English-inspired Maryland garden is home to acres of opulent plant life including bushes shaped into an entire fox hunt.

A blank headstone topped with a pile of pennies marks the final resting place of the infamous assassin.

The former home of a disgraced local priest now hosts a mysterious secret supper club.

A ruined mansion hidden in the woods of the Hudson Valley, home of a tragically doomed romance.

Collapsing castle on the Hudson river was once the storage site of military surplus business.

A plaque on a rock dedicated to a famous, forgotten author, and put in an impossible place.

The highest point in New Jersey is marked by a massive, if simply named, obelisk.

Original factory of John G. Borden who started what we know today known as Borden Dairy.

Though its celestial ceiling is impressive, the true star is the vast collection of French books.

A historic 1890s architectural masterpiece with an iconic clock tower that, once open to the public, now faces an uncertain future.

In the power of this waterfall, Alexander Hamilton saw the potential for industry.

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

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

Originally built in 1869, this castle is currently part of Felician University's campus.

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

Series of storm drains connected to a dark urban legend.

A billionaire heiress' menagerie of animals were lovingly laid to rest on the grounds of her former estate.

The wooden octagon in which Huckleberry Finn and A Connecticut Yankee were born can still be visited in upstate New York.

American involvement in World War I officially ended in 1921 in New Jersey, three years late and thousands of miles from the battlefield.

The dairy farm in upstate New York where nearly half a million people gathered for three days of peace and music in 1969.