A six-story treehouse offers spectacular views of New York's Finger Lakes region.

This London marker celebrates the spot where the world-famous English band was founded.

Constructed from the ruins of a former glass factory, this park incorporates the old with the new.

Housing the history of a small Ohio town that is known to some as the pottery capital of the United States.

Built around 1845, this house was occupied for 100 years, serving as a home to a prosecuting attorney, a Union Civil War general, and a wealthy socialite.

This 30,000 square-foot museum is home to an extensive collection of art and artifacts that reflect the history of southwest Ohio.

A bronze statue of Mister Rogers in the neighborhood where he grew up.

The mounds at this site were reconstructed with the help of archaeologists and historians.

These enormous, stern-faced statues greet visitors with lanterns, and sometimes costumes.

The eccentricities of a former lord include painted pigeons of his manor house, a series of pointless plaques, and a folly built simply to peeve the public.

One of the most popular brands of glass among collectors, the story of the A.H. Heisey & Company glassmaker is told in this Newark museum.

The crash of this great airship signaled the beginning of the end for dirigibles.

All that remains of a gigantic earth-moving machine.

This underground holding cell was forgotten for over a century and rediscovered in the 1960s.

The only fully-realized skyscraper built by the famed American architect, Frank Lloyd Wright.

In the mountains of West Virginia is this perfectly preserved Art Deco train station.

More than 3,200 cookie jars line the walls and shelves of this little shop and over 1,000 salt and pepper shakers

It's a unique monument honoring a great character who inspired a generation of young women to be more and pursue their dreams.

This futuristic airport terminal was abandoned for decades before reopening as a hotel—with a vintage plane of its own parked out back.

An elaborate memorial to a man local legend says died of a broken heart.

This Art Deco service station has been providing tune-ups and turning heads for close to a century.

This Buffalo museum hides an Art Deco gas station designed by Frank Lloyd Wright.

Rhode Island's tallest building bears a resemblance to the "Daily Planet" building and has been empty for more than five years.

The shared home of a utopian commune that practiced "free love" a century before the hippies.