This study room in the New York Public Library saw the creation of one of contemporary America's greatest traitors.

A dark patch of the ceiling at Grand Central Terminal which was not restored is still stained brown by tobacco.

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

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

A Red Hook dive bar that is holding onto its roots.

A community farm in the midst of the Brooklyn concrete.

During the 19th century, you could pay for violence off a prix fixe menu on this Manhattan street.

Once a popular watering hole among longshoremen and shipyard workers, this neighborhood treasure spans more than 100 years of Red Hook history.

One kilometer of thick brass rod laid out before your eyes.

In the back of a nondescript sports bar is a museum-worthy mural by legendary cartoonists.

Spinning silently in the lobby of an Art Deco masterwork is a massive vintage model of the Earth.

A clock set into the concrete outside a Manhattan jeweler has been telling time underfoot for over a century.

Neon signs that grace the windows of Bergdorf Goodman's and Tiffany & Co. come from this studio in Brooklyn.

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

This pair of eccentric Ohio castles were built by a pair of brothers who wanted to bring a bit of class to the Ohio wilderness.

Known as "The Dome" this is the world's largest open air geodesic dome.

The only depiction of Abraham Lincoln holding a weapon, and the names of all 9,000 Cuyahoga veterans of the Civil War.

Dental instruments from the illustrious history of American dentistry.

A quirky Poe-themed joint on an island keen to celebrate its overlooked connection to the famous writer.

This bar hosts an ever-evolving napkin art installation devoted to an American president.

This set of rickety spaceships are prepared to give alien travelers a place to relax and go to the bathroom.

This small memorial is almost as well concealed as Smalls himself was on the night he sailed to freedom.

South Carolina's last remaining slavery auction house is now a museum devoted to its own tragic history.