This tiny church near Sleepy Hollow contains Henri Matisse's last work, a rose window, and nine windows by Marc Chagall.

A historic Black graveyard hidden in the parking lot of one of America's largest malls.

One of the earliest bowling lanes in the U.S. doubled as a sewing school during a time when women had little job opportunity.

Haunted Victorian house that inspired a legendary "Ghostbusters" court ruling.

Protecting the future of some of the rarest and most misunderstood mammals of North America.

The name of this famed hospital was once a byword for the horrors of medical and psychiatric care.

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

This hospital fell into ruins after failing to act as the advocate for the mentally ill it was designed to be.

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

A large boulder marks the place where the island of Manhattan was purportedly "sold" to the Dutch.

The first "Hall of Fame" in America was designed by legendary Gilded Age architect Stanford White for what was then the NYU uptown campus.

This small New York museum celebrates the mountainous artwork of a Russian mystic.

This was one of the first (and last) university-built and operated nuclear reactors.

Harlem park dedicated to compulsive hoarders killed by their own junk.

Rare moles meet activism at this Oaxacan eatery.

A curious fountain that has no water and includes Satan, a crab, and 9 giraffes.

A sculptural commentary on capitalism pokes up from the East River.

More than 300,000 historical artifacts from the famous music venue, from Duke Ellington's handwritten score to The Beatles' booking slip.

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

The first and only carousel with a lineup entirely of insects.

You must take the A train... to the last active cemetery in Manhattan.

Collect holy water from a Bronx grotto.

Series of storm drains connected to a dark urban legend.

The famous author's cottage hideaway.