A forgotten relic from New York's bygone trolley system hides in plain sight under a bridge.

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

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

The last remnants of what was once one of the world's grandest hotels can now be found in a Manhattan subway station.

Hundreds of antique bank vault locks on display in New York City.

The notorious headquarters of a corrupt political machine.

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

The site of the deadly Triangle Shirtwaist Factory Fire.

This historic building housed the surviving crew members of the Titanic, who were left destitute after the wreck.

Salute the leader of the proletariat.

This speakeasy continues the Prohibition-era legacy of Harlem's jazzy Swing Street.

Touching mementoes from those who didn't make it back from World War I still hang in one of New York's oldest bars.

The rough and tumble president's childhood home displays the shirt he was once shot in and the speech that saved him.

New York City's only radical feminist independent bookstore.

Cryptic messages embedded in the New York City sidewalk.

The first museum in the United States dedicated entirely to posters.

Make a tough dinner decision: Octopus wasabi roulette or bull penis?

Plot your trip through the city on the sidewalk.

Manhattan's lighthouse, erected at the insistence of the unsinkable Molly Brown.

Unlock the secrets of the conjuring arts.

A dark, dank room in subterranean Manhattan was the site of a ghastly murder.

Great place to have a drink and a bite to eat in an atmosphere laden with New York's Bohemian past.

The fanciest public restroom in New York City boasts fresh flowers, art, and a classical music soundtrack.

An unassuming secret door once led to a legendary watering hole.