Church in Manhattan holds the bloody sock of Padre Pio, among with many other unusual relics.

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

This Queens hospital has stood abandoned for almost 20 years after its patients were secretly relocated in the dead of night.

One Brooklyn man's collection of life-size fiberglass statues has taken over his entire yard.

This interactive gallery makes you feel like you've stepped into a fantasy world filled with whimsical monsters.

Just your average Marie Antoinette–themed speakeasy in an abandoned 19th-century subway tunnel.

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

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

Feral cats keeping the rodent population at bay all across Greenpoint waterfront.

A posh members-only club with a literally dramatic history.

The mummified relics of an American missionary.

This former crime corner has been turned into an eclectic community center.

Discover the taste of mold.

A Manhattan office building is home to the world's largest chess board.

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

Check out the underground party scene at the "Burning Man of Brooklyn."

A collection of fanzines, recordings, and documents detailing the rise and influence of the feminist punk movement.

A Manhattan Episcopal church with an eerie underground crypt.

Commemorating the spot where the famous scientist fed his pigeons.

This iconic tattoo shop has its own onsite museum with artifacts from the early history of modern body art.

Relics given to a Manhattan church to avoid seizure by the Italian government.

The former hotel where Tesla invented the radio.

This hidden library of physiological ephemera contains centuries worth of knowledge on the vim and viscera of the human body.

The famous author's cottage hideaway.