A long abandoned hospital building on the outskirts of NYC.

A historic lighthouse steeped in rumors of ghost and pirate stories.

The second-largest (of only two in the world) large particle collider is the underdog of experimental physics.

A mysterious air force base built to resemble a Long Island fishing village.

Once the center of food production for this small town.

A millionaire's abandoned swimming pool from the gilded age of one of America's most distinguished families.

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

A historic town sits upon the site of a long-lost 18th-century trading community.

Thomas Edison's home and final resting place also boasts an impressive garage, where some of the earliest electric cars are on display.

Take a step into the workshop where Edison and his employees revolutionized the world.

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

This fancifully decorated Victorian home in New York’s Hudson Valley is the only known fully domed octagonal residence in the United States.

The home of one of America's most wealthy industrialists is now a historic site that remembers a more decadent time in the country's history.

The real-life site of Ichabod Crane's infamous gourd attack.

This once-grand marvel of engineering is now 41 miles of scenic hiking trail.

This dilapidated castle-like structure overlooks the Hudson River at one of its widest points and was once home to nuns.

A beautiful, historic location open to the public.

Small monoliths of several varieties of stone sit alongside a wooded path in the Bronx.

A monument stands to the famous suffragist who penned the declaration for women's equal rights, including the right to vote.

The end of the 4 Line is also the end of the line for 300,000 souls in one of NYC's most illustrious cemeteries.

This plot of old-growth forest is the largest surviving remnant of New York City's original woodland.

Hidden inside one of the world's most well-visited zoos is a secret plaque promising eternal life.

A riverfront park that both remediated and preserved its industrial past.

Home to the infamous "Typhoid Mary" and the worst loss of life in New York's history prior to September 11, 2001.