Why have you never heard of the second most popular tourist site in New York?

An abandoned asylum once on the cutting edge of lobotomies may be reborn as a Christian college.

An old abandoned mining town in The Adirondacks where Theodore Roosevelt first learned of the shooting of President William McKinley.

Hidden in one of New York's oldest subway stations is the final remnant of the site of the bizarre Shakespeare Riots.

There’s a secret bunker inside the Brooklyn Bridge, but the city won’t say where.

Home on the Hillside, and home of the first breakfast cereal.

The oldest living tree in Manhattan comes shrouded in sinister legend.

In upstate New York, gorgeous waterfalls and a watermill are slowly being reclaimed by nature.

Protecting the future of some of the rarest and most misunderstood mammals of North America.

This empty Victorian manse on Staten Island is said to be haunted but is actually a real life crime scene.

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

Reclaimed by nature, the ruins of Doodletown, New York are remnants of a town consumed by a state park.

Avoid gangster interaction while window-shopping.

America's greatest forgotten garden and the former stomping grounds of Son of Sam.

The site of a tragic massacre that spawned a multimedia franchise.

An unrealized dream to wirelessly electrify the entire Earth.

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

Cryptic messages embedded in the New York City sidewalk.

Long the exclusive domain of birds and vagabonds, this little-known Central Park peninsula is open to the public once more.

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

One man's swirling six-acre monument of stone.

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

Deep under Manhattan is the largest construction project in city history. So far, the project has taken the lives of 23 workers, or "a man a mile."

An abandoned asylum where patients have been forgotten but their possessions remain.