A local prank turned town icon.

Recognized the world over as the home of the McCallisters in the 1990 movie "Home Alone."

Tour the luxe "glass cage" that inspired and unnerved the architecture world upon its debut.

Cold War missile launch site which has been converted to a public park.

First planned industrial community in the United States.

Urban explorers embraced America's now demolished first suburban mall, south of Chicago.

This stone tower marks a lookout point over the historic Washington Crossing, and maybe some buried treasure.

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

One of the oldest log cabins in America is one of the last of its kind this historic Swedish dwelling remains a piece of living history.

An outlandish shoe shaped house built by an eccentric millionaire.

There aren't too many operational funiculars around, but Pittsburgh has two!

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

North America's oldest quarantine facility was built in response to Philadelphia's 1793 yellow fever outbreak.

The internal railway of one of the biggest steel plants in America has been transformed into a linear park with unique industrial views.

Once the "Eighth Wonder of the World," this iron railroad bridge was decimated by a tornado.

The remains of a community that was forced to move for a dam that never materialized still rot in this Pennsylvania park.

A failed piece of Orientalism has become the proud symbol of a community.

This eerily well-preserved coal town was saved from destruction by a Sean Connery movie.

A stone arch leads to a cavernous 1930s spring house tucked away in the Pennsylvania woods.

Pennsylvanian mass grave and possibly mass murder.

When the Austin Dam failed it destroyed much of Austin...and then it failed again.

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

Collection of trolley cars in the woods represent one man's attempt to preserve transportation history.

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