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

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

The beloved statue at the National Academy of Sciences is oh so inviting to sit on.

This statue is dedicated to Grace Sherwood, the last person in Virginia to be convicted of being a witch.

Elevated freight railway turned wildly successful urban park.

America's greatest forgotten garden and the former stomping grounds of Son of Sam.

Chicago's Navy Pier on Lake Michigan was a training hub for aircraft carrier pilots during WWII.

One of the few remaining relics of the meatpacking hub that made Chicago the "hog butcher to the world."

Half-sized replica of the Leaning Tower of Pisa built to honor Galileo.

Recognized the world over as the home of the McCallisters in the 1990 movie "Home Alone."

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

Site of a former hidden treehouse in New Orleans.

The world-record holder for the longest bridge stretching continuously over water.

Formerly known as National D-Day Museum, this collection commemorates the battles of Normandy and WWII.

The oldest family-run restaurant in the United States is a living museum of New Orleans dining history.

This symbolic piece of New Orleans architecture is also home to a few ghastly stories.

A 200-year-old bar in the historic French Quarter refuses to give up its place in history, nor its role in securing ours.

One of the largest pieces of scientific equipment ever carried on a NASA space shuttle sits in a Chicago alley.

Two community gardens under the elevated subway lines on a very busy commercial strip in Bushwick.

A giant scrap metal troll rests his hands on top of a dilapidated building covered in graffiti.

While many places make the claim, the Library of Congress says this restaurant is the birthplace of the hamburger.

A wooden theatre that remains the heart of a charming Victorian-era New Jersey enclave.

This Delaware River bridge is emblazoned with a catty slogan from a more prosperous time.