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

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

If you were standing here on October 5th, 1950, you'd be dead.

Tucked away amidst some of the most famous addresses in the world is New York's only fraction of a street.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

The "Seinfeld" diner.

This futuristic airport terminal was abandoned for decades before reopening as a hotel—with a vintage plane of its own parked out back.

A once crucial portion of the Long Island railroad still lays abandoned, waiting to be turned into an urban park.

A uniquely lettered street sign marks the corner where the iconic word game was invented.

Nine nice parcels of land along a flight path offer a quiet respite... until a plane soars overhead.

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

A retired subway car stands alone in a field in the middle of Queens.

The preserved house of a jazz legend still echoes with his music.

The crown jewel of the Queens Museum is a nearly 10,000-square-foot architectural model of the city originally built for the 1964 World's Fair.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

Hidden inside one of the world's most well-visited zoos is a secret plaque promising eternal life.

The second-largest (of only two in the world) large particle collider is the underdog of experimental physics.

An unrealized dream to wirelessly electrify the entire Earth.

An American city stranded at the tip of a Canadian peninsula where strict adherence to the "49th parallel rule" became problematic.