A crumbling staircase in upper Manhattan is all that remains of one of the most important sites in sports history.

You must take the A train... to the last active cemetery in Manhattan.

Rat sculptures try to infiltrate the Graybar Building in an architectural tribute to New York City's nautical history.

Long-forgotten artifacts give incredible insight into New York's most glamorous hotel.

This curved Manhattan building was built to house the opulence of John D. Rockefeller's oil empire.

A sculptural commentary on capitalism pokes up from the East River.

Imagine having a street run right through your home, or better yet, a historic bridge three stories high.

This historic building housed the surviving crew members of the Titanic, who were left destitute after the wreck.

This abandoned caretaker's apartment is one of 13 left in the New York Public Library system.

The site of the deadly Triangle Shirtwaist Factory Fire.

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

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

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

A former insane asylum despised by Nelly Bly and Charles Dickens is now fashionable apartments.

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

Historical figures from New York City's Catholic community reside in Midtown.

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."

Built as a gift to the hottest tastemaker of the time, these hidden quarters remain an Art Deco showpiece.

Lie in a hammock where George Washington stood.

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

This abandoned subway station can still be seen on regular commuter trips.

A dark, dank room in subterranean Manhattan was the site of a ghastly murder.

The beautiful tunnel that ran from the lobby to Penn Station is still hidden underneath 34th Street.

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