A giant ball made from pieces of an old Jeep.

The residents of the Neighborhood of Make-Believe live without much fanfare within the Pittsburgh Children's Museum.

The end of the 4 Line is also the end of the line for 300,000 souls in one of NYC's most illustrious cemeteries.

This plot of old-growth forest is the largest surviving remnant of New York City's original woodland.

Funded by John D. Rockefeller, this is one of the earliest, and most beautiful, shopping arcades in America.

One of Savannah's oldest and most haunted cemeteries, featuring graves desecrated by Sherman's Union Army.

An eerie smiling woman looms above the granite tombstones.

More than a century after her death, Little Gracie Watson remains one of Savannah's most often-visited residents.

The language and heritage of a nearly forgotten culture can still be explored in this Southern enclave.

This cathedral dedicated to Louis IX, sainted King of France, holds many secrets.

The universally beloved children's television figure is interred on a high hilltop in one of western Pennsylvania's oldest cemeteries.

Could it have picked a better place to land?

This secluded walking trail is a hidden gem of a Pittsburgh park.

An imposing pair of sphinxes stand guard outside this Egyptian Revival tomb.

This quarter-mile tunnel under the Bluff in Pittsburgh bends at a 45-degree angle.

The last remnants of Fort Pitt also hold the distinction of being the oldest structure west of the Allegheny Mountains.

Once the site of a Native American harvest festival, this humble clearing later played an invaluable role in the birth of jazz.

"Where the ducks walk on fish."

The largest clock face in the United States is twice the size of Big Ben and infinitely more ad-sponsored.

This distinctive Crescent City tradition dates back to the days of horse-drawn carriages.

While most wind tunnels test scale models, the "Cave of Winds" was large enough for actual airplanes.

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

The land is home to swimming ponies and a legendary 18th-century treasure.

After a water tower painting was accused of being an ad, a simple fix was made that gave the city a motto.