A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

The world's second largest single-dish radio telescope, once used to contact E.T.

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

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

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

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

The "Seinfeld" diner.

More gold than anywhere else, ever.

Elevated freight railway turned wildly successful urban park.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

What happens when a sculptor has to find a way around a 100-year-old copyright.

The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.

The sweetest graveyard in the world is filled with headstones for dearly de-pinted ice cream flavors.

All you ever needed or wanted to know about America's favorite whiskey, but not a drop to drink.

This replica of the Greek structure is in the heart of Nashville.

What was once a true peninsula has now been filled in, causing the water to recede and leaving many streetside "waterfronts" and landlocked "islands."

The world's largest piece of copyrighted artwork.

An interesting decoration on this historic site, this weathervane comes with as many legends as it does questions.

The massive machine creates cracking displays of indoor lightning.

Each August, one of the largest religious (and food) celebrations in the country is held in Boston.

One of the last remaining World War II Victory Gardens in the U.S. is quietly growing across from Fenway Park.

American revolutionaries and British soldiers alike are buried here in the fourth-ever cemetery in Boston.

Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

Historic Hull Street was actually the first street with a proper name in the Boston area.