The only presidential monument to display a late POTUS's actual casket.

This beautiful stone arch bridge wasn't even expected to stand for one day, but people have been crossing it for centuries.

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

House of vintage taxidermy and Steampunk sculptures in a quiet Pittsburgh neighborhood.

This historic Pittsburgh tennis complex is a rare example of natural red clay courts.

Could it have picked a better place to land?

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

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

The site of the little-known Pennsylvania battle that sparked the Seven Years' War.

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

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

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

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

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

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

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.

An 18th-century Catholic church converted into an eccentric temple of music and bacchanalia.

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

This university transit system is a 1970's vision of the future.

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

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

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

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