An abandoned stretch of highway, deteriorating next to the operational one.

A particularly creepy abandoned hospital that sparks interest for lovers of the supernatural.

Behold the rickety wooden glory of the world's oldest operating roller coaster.

This dramatic rail curve was once the target of a failed Nazi attack.

Where the oil industry began.

"Where the ducks walk on fish."

The site of America's first commercial oil well essentially disappeared after the town went bust.

This massive airship factory is so large that it has its own indoor weather.

Pennsylvania's highest point is spotted with boulders which were pushed to the surface by nothing but cold.

Memorializing an American tragedy of massive proportions.

Steepest flood safety railway in the entire world.

A grandiose title could not save this mercantile community from obscurity.

The site of Neil Armstrong's first flight is marked by a full on replica of the moon landers.

This alley-cum-fan gallery in the ex-Nirvana drummer's hometown holds the world's largest drumsticks.

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

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

Beyond the usual stories that attend old prisons, this one has deep bloody undercurrents.

The largest burial mound in the United States holds the remains of prehistoric West Virginians.

Pennsylvania's own Roswell-style UFO mystery.

There are more than 4 million bricks inside this unofficial Lego museum in a former middle school.

Despite its lavish ornamentation, and wholesome lifestyle of its devotees, this mountain commune has faced its share of issues.

This shrine to McDonalds' most iconic sandwich holds a 14-foot tall burger.

A museum commemorating the Donora Smog, which killed 20 people in October 1948 and sparked national outrage over air pollution.

A model of a dinosaur that was named for Andrew Carnegie stands outside the museum that also bears his name.