Read between the lines of the subway map to find the hidden abandoned Civil War fort.

Nondescript elevator doors open to reveal a stunning, surreal world.

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

A restaurant on Staten Island showcases a different grandmother’s cooking every night.

The "Seinfeld" diner.

Sniff the Titan Arum's rotting flesh.

Ride the subways of yesteryear.

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

A New York garbage depot holds a secret collection of weird and wonderful refuse.

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

The oldest family-run luncheonette in New York, last renovated in 1948, still serves food and drinks the old-fashioned way.

A miniature rainforest is growing inside of a Midtown Manhattan office building.

The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

A crumbling hospital from the 1850s on Roosevelt Island.

This spooky road cut through a mound of ancient coral might be haunted by a witch.

This single room has survived the centuries with almost no deterioration.