For over 30 years the walls of this Harlem schoolyard have been a gallery of street art by "Kings and better."

Tucked in a nondescript downtown Brooklyn mall is a bar containing a remarkable turn of the century anatomical wax collection last seen in 1920s Berlin.

The original toys that inspired the beloved children's stories are on display at the New York Public Library.

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

The "Seinfeld" diner.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

One of only two commuter aerial tramways in the United States.

Elevated freight railway turned wildly successful urban park.

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.

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

A monumental cross hides in the trees in Golden Gate Park.

Golden Gate Park's historic collection of plants.

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

San Francisco's newly reopened hands-on science museum.

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.

These curious caverns have been home to mushrooms, gangsters, and disco.

A terrific purveyor of natural history objects and curios.

Ironically this massive termite is the mascot for a company that is acclaimed for killing his kind.