This former tuberculosis treatment facility now stands at the center of a public park.

This former factory has deep ties to rubber production in Akron.

The ruins of the suspension bridge hang over Kingsbury Run as a ghost of racial prejudice.

This lovely university observatory continues to sit abandoned since its potential savior was sent to jail for fraud.

The home made famous by the 1983 holiday classic is now a perfectly preserved shrine to the movie.

The only remnant of a small mining town is an abandoned railroad tunnel that is steeped in ghostly lore.

The last remnants of Fort Pitt also hold the distinction of being the oldest structure west of the Allegheny Mountains.

This public park was the site of the largest civilian disaster of the Civil War.

Once used to screen films for theater owners to rent, this historic building is now a start up hub.

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

This icon of the Atomic Age now lays dormant.

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

A macabre farm reserved part of its 222-acres for dead bodies, all in the name of science.

The only way to see Pittsburgh is from the top of this lookout point, just like the ancient members of the native peoples did.

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

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

The first home and studio that belonged to the famous architect.

One of the oldest, tallest, and most haunted lighthouses in America.

Used as a military post in three different engagements, this fort has remained incomplete and unfired upon for nearly 200 years.

Allegedly haunted by Walt Disney himself, this inconspicuous lamp is always kept lit in his honor.

A modest walled graveyard where nobody is actually buried.

This replica of a 16th-century French settlement memorializes one of the earliest attempts at a European settlement in North America.

Final remnants of the 1895 Cotton States and International Exposition.

Three hundred years of preserved Spanish colonial history in San Antonio.