A dark patch of the ceiling at Grand Central Terminal which was not restored is still stained brown by tobacco.

Spinning silently in the lobby of an Art Deco masterwork is a massive vintage model of the Earth.

100 massive sculptures in the Hudson River Valley.

These unassuming lighthouses have seen the first reading of the Pledge of Allegiance, the first wireless transmission, and more than one mystery.

Rusting away on the edge of New Jersey are the remains of a Cold War missile launch site.

An abandoned subway tunnel that could have reinvigorated Staten Island still lies somewhere beneath this Brooklyn park.

A former poultry store that looks like a giant duck and is one of the "seven wonders" of Long Island.

This preserved wilderness hides the remains of a colonial grain mill used to feed George Washington's troops.

This museum-within-a-museum pays tribute to "The World's Most Experienced Airline."

An abandoned Gold Coast-era mansion once intended for the exiled ruler of Albania, who never arrived.

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

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

A living antique aviation museum in the historic town of Red Hook, New York.

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

A Victorian cemetery in the heart of Brooklyn remains a popular mecca of morbid curiosity.

I fought the law and the precinct caved in.

This beloved marketplace mascot poops money and grants good luck.

The origin of this mechanical boy was a mystery until he revealed his maker by writing it in perfect cursive.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

Disney's abandoned animal island is now an overgrown ruin that was almost the coolest attraction ever.

A glimpse at Walt Disney's vision for a "community of tomorrow," in miniature.

Touching mementoes from those who didn't make it back from World War I still hang in one of New York's oldest bars.

A granite monument honors a beloved World War II canine mascot.

Empty, but not abandoned, this cavernous Brooklyn loading dock was once considered the largest individual building in the world.