An overgrown garden stands as a grim marker of an unrealized dream.

With 3,000 bikes on display, the world's largest bicycle museum includes some famous rarities.

A giant ball made from pieces of an old Jeep.

Its vintage camera collection gives a snapshot of the past as viewed through a photographic lens.

This Old Testament garden features 100 plants from biblical times.

This picturesque stream was up until recently the site of a ten story mountain of slag and sewage.

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

Pennsylvania's own Roswell-style UFO mystery.

The house that Frank Lloyd Wright "(shook) out of his sleeve at will" at the age of 86.

One man's swirling six-acre monument of stone.

This small Catskills village has six independent bookstores and more bookshops than restaurants.

The world's largest kaleidoscope, designed by a 1960s psychedelic artist.

A mythical bird etched into the face of a rock doubles as the mascot for a nearby school.

First known as the "Sample House," this construction mash-up was meant to be a living catalogue of building styles.

A notorious Route 66 eatery once frequented by Al Capone.

Fresh wooden posts have been added to ancient holes to recreate a primitive henge clock.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

Less a museum than a bizarre fantasy world created by artists and engineers.

Entombed in this strange, white stone hill are the deadly remains of radioactive weapons production.

This former small town was destroyed not by the motor oil it sprayed the ground with but by the toxic waste that was added.

Built from oil field parts and resembling a teepee, this abandoned mid-century church is hoping for a comeback.

Tucked away on an empty wooded lot in suburban Oklahoma City lie the remnants of an abandoned circus camp.

Only museum dedicated to women pilots, with personal artifacts from Amelia Earhart and other aviatrixes.