One of the oldest living oak trees in the Southeast.

The famous bell was secreted away and hidden in a church in Allentown during the British occupation of Philadelphia.

Along the historic Mother Road is an old gas station with a secret counterfeiting past.

Travel through the hidden underbelly of the city in colorful tunnels filled with art and history exhibits.

An office built to look like a giant basket.

The childhood home of the Wright Brothers in Dayton.

This former factory has deep ties to rubber production in Akron.

The former broadcast site has been reimagined as a museum about the medium.

The only known Futuro house in North Carolina sits along a stretch of desolate highway on the Outer Banks.  .

Celebrating the greatest pugilists the world has ever known.

Fake subway tiles were installed to cover a design that resembled the Confederate flag—it's unclear if the resemblance was intentional.

This slender three-story building has also had several famous residents.

Pulled from the rubble of one of the worst modern tragedies, a steel crossbeam became a symbol of hope for New Yorkers.

Waterway populated with abandoned projects, including a submarine.

The 28-foot granite map plots the locations of 40 theaters in New York City.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

The site of a tragic massacre that spawned a multimedia franchise.

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

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

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

In 1967, murder and mayhem disrupted the tranquility along this quiet stretch of Old Route 66.

The only Native American comic shop in the world.

If drivers cross the rumble strip on this stretch of Route 66 at just the right speed it plays "America the Beautiful."

This building is a recreation of the gatehouse that separated Los Alamos from the outside world during the era of the Manhattan Project.