Deep scars on the earth left by the Ice Age.

An abandoned munitions factory with a shot tower continues to wage war on the surrounding environment.

An abandoned asylum incorporated into a college campus.

Memorials and tributes scattered across the university grounds remember a famous national tragedy of the Nixon era.

This pair of eccentric Ohio castles were built by a pair of brothers who wanted to bring a bit of class to the Ohio wilderness.

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

What is it about mushrooms that makes people wish they lived inside of them?

This magnificent Cincinnati graveyard is also a popular public park.

A toxic ghost town sitting atop a massive coal fire.

One of the steepest streets in the United States makes an intriguing challenge for cyclists.

The first American department store, and home to the largest operating musical instrument in the world.

This Philly cemetery is the eternal home of many famous area residents, including Rocky Balboa's wife.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

A tradition unlike any other, this marks the site of the annual Groundhog's Day tradition.

Found art has transformed this Pittsburgh neighborhood into a psychedelic dream.

One man's real life disfigurement inspired a lasting local legend surrounding an eerie tunnel.

An Irish Memorial commemorating those who perished due to potato blight.

"Where the ducks walk on fish."

These disused steel furnaces are now haunting ruins that may one day be a national park.

A restored Pittsburgh house of God has been converted to a marvelous house of suds.

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

Meet your friends, marry your true love, or tell your enemies to kiss your butt under this historic Pittsburgh timepiece.

A portion of the old Pirates stadium over which a defining home run once flew still stands even after the rest of the stadium was torn down.

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