Where the oil industry began.

Memorializing an American tragedy of massive proportions.

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

The sounds of the world's largest fully functioning pipe organ dazzle shoppers at a Philadelphia Macy's.

This jail which was in service for over a century is now open for curious visitors.

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

This elaborate towering structure was once famed for its revolutionary height.

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

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

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

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

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

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

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

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

The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

In which a local geological marvel becomes a quaint roadside attraction.

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

Eccentric concrete mansion and museum designed and built by hand from the inside out.

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

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

Steepest flood safety railway in the entire world.

Yo, Adrian!

A daily replay of the experiment that proved the rotation of the Earth.