Steam out your ears for New Year's Eve.

Four cars from the old system were once on display, but were removed in 2014.

There's a piece of New York City transportation history hidden in plain sight at a Manhattan subway stop.

An accidentally hidden library containing the ephemeral history of New York.

Visit the site of a subway powered by nothing more than air--and lots of it.

Abandoned 19th century homes once occupied by naval officers, soon to be demolished.

Walk over a 150 year old manhole.

A museum devoted to bringing to light forgotten or neglected histories through exhibitions, education and public programming.

Hidden in an ordinary Midtown building is a one-room museum dedicated to the greatest escape artist.

A legendary speakeasy bookstore returns from the brink.

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

A mosaic made of materials gathered from this Brooklyn community adorns the walls of this tunnel.

This outdoor gallery of sculptures along the East River was once a landfill.

This unusual apartment building may be Brooklyn's own version of the Leaning Tower of Pisa.

A cruise terminal that changes the atmosphere of Red Hook's industrial waterfront.

Neoclassical bank designed by NY architects Helmle & Huberty.

Once home to the country's most gargantuan ships, this graving dock now waits for people to buy furniture.

A 120-year oil leak slowly unleashes more gallons of oil than the Exxon/Mobil disaster.

The rare American Civil War-era weapon was never fired in anger.

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

The ballpark in "Pigtown" where the Brooklyn Dodgers made their name was replaced with a huge apartment complex.

Once a flowing stream and where the USS Monitor, the world's first ironclad, was built and launched.

The one-time office of the architectural firm that ushered in the Gilded Age is now a Club Monaco.

No monkeying around, this fountain was really named after the classic sci-fi film.