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

Mysterious 500-year-old tapestries depict a unicorn hunt.

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

Under a glass sidewalk lie the remains of some of Manhattan's oldest buildings.

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

Become a prohibition rebel.

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.

New York's oldest magic store.

This beautiful building in the heart of Manhattan's Financial District was empty for decades.

Tucked in the back of this amazing antique store is an important piece of medical history.

A crumbling hospital from the 1850s on Roosevelt Island.

Home to the infamous "Typhoid Mary" and the worst loss of life in New York's history prior to September 11, 2001.