Costumed elves and mountain bikers co-exist peacefully at this abandoned Christmas-themed adventure park.

The one-stop shop for all of your superhero (or evil arch-nemesis) needs.

First a horse rendering plant, then a 19th century landfill, this beach is full of glass from thousands upon thousands of broken bottles.

A band of aerialists and circus performers putting on incredible shows in East Williamsburg.

Take in a rare, face-to-face glimpse of Lady Liberty at this tucked away Red Hook park.

Records of the dead describe the myriad odd ways people used to die.

Sniff the Titan Arum's rotting flesh.

Rummage through this sunken ship, but leave your scuba gear at home.

Risk arrest while partying to fund art.

Prove you deserve to be fed by Kenny Shopsin.

A massive forgotten storehouse from 1913 on the Brooklyn Waterfront has a spectacular view of Brooklyn.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

A crumbling hospital from the 1850s on Roosevelt Island.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

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

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

For over 30 years the walls of this Harlem schoolyard have been a gallery of street art by "Kings and better."

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

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

The oldest house in Manhattan is now a museum that remembers the home's sordid history of scandals, vice-presidents, and ghosts.

This ruined fort hidden at the top of Central Park can't seem to keep from losing its historical plaques.

Hidden in plain sight on a pair of Manhattan subway tunnels are a pair of public instruments that sing to each other.

Hidden in Central Park's Ramble is a troublesome cave buried just beneath the surface.