In its day this historic fort held 100 cannons pointed in almost every direction to protect New York.

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

Holding the most bodies of any cemetery in the United States.

New York City's only radical feminist independent bookstore.

Unrepaired walls from a 1920 anarchist bomb attack.

Cryptic messages embedded in the New York City sidewalk.

This subterranean oyster house has been the pearl of Grand Central Station since 1913.

Visit the monolithic tomb of America's most famous general.

Plot your trip through the city on the sidewalk.

Decades after testing the polio vaccine on unwitting patients, this historic mental hospital sits in ruin.

An artist's cute bronze subway sculptures belie his violent artistic past.

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

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

The oldest surviving bridge in New York City, which reopened to pedestrians in 2015.

An abandoned castle owned and ignored by Masons carries a cursed history.

Collapsing castle on the Hudson river was once the storage site of military surplus business.

New York City's smallest piece of private property.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

Elevated freight railway turned wildly successful urban park.

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

A way to take your secrets to someone else's grave.