Where the oil industry began.

First a root beer ad, then a golf course clubhouse, and finally a massive teapot.

After covering almost 1.5 billion acres, the survey's still not finished.

Could it have picked a better place to land?

An otherwise quiet campground becomes a bustling medieval town for two weeks every year.

A monument to the “unrecognized dead” of the tragic 1876 train crash.

"Where the ducks walk on fish."

The Pennsylvania landscape depicted by a quarter mile of mosaics made from used road signs.

The only statue of its kind to commemorate Washington's beginnings as an officer of the British Colonial Militia.

A living maritime paradox still floats in the same lake where it was built and resurrected... or was it?

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

The heroic sled dog of the 1925 serum run is preserved in taxidermy.

A dazzling display of lights and crystals.

Cleveland's giant "free" stamp is a nod to the Civil War, but was misinterpreted for years.

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

This quarter-mile tunnel under the Bluff in Pittsburgh bends at a 45-degree angle.

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

Despite being stolen multiple times, this civic electrician's street corner Snoopy won't be stopped.

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

This permanent exhibition celebrates the finest of our heartless automatons both real and fictional.

This spot memorializes one of the greatest plays in NFL history, unless you happen to be a Raiders fan.

A piece of baseball history is preserved in a Pittsburgh parking lot.

The residents of the Neighborhood of Make-Believe live without much fanfare within the Pittsburgh Children's Museum.

A giant ball made from pieces of an old Jeep.