Golden and naked, the figure that was once the highest point in New York is all that remains of the second Madison Square Garden.

Enjoy a slice while browsing the world's largest collection of pizza memorabilia.

This elaborate towering structure was once famed for its revolutionary height.

Yo, Adrian!

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

A layered tribute to the work of mosaicist Isaiah Zagar.

World's first "penitentiary," meant to be humane, drove men insane.

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

The fanciest public restroom in New York City boasts fresh flowers, art, and a classical music soundtrack.

Cryptic messages embedded in the New York City sidewalk.

A popular European tradition makes its way to the states on one of America's most famous bridges.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

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

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

A Pythagorean funhouse that tries, successfully, to prove that math is the coolest thing ever.

Elevated freight railway turned wildly successful urban park.

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

A little-known museum of Ancient Roman and Ancient Greek artifacts.

More than 100 colorful residents stand post in this seaside Australian city.

The Victoria-era quarantine station for Sydney.

This piece of Australian modern art is part joke and part history.

This private residence was the template for one of the most beloved television homes of all time.

San Francisco's urban bison herd has persisted in the face of extinction, development, and disease.

A historic hotel that made a cameo in Hitchcock's classic film has no intention of letting guests forget its fame.