Population: 1.

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

In an odd geographic anomaly this city borders two different states on opposite sides of town.

A favorite of Amelia Earhart, ranking among those rare bridges that can be crossed without changing sides of the river.

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.

Nothing says indulgence like a 1,500-pound chocolate castle.

Beyond the usual stories that attend old prisons, this one has deep bloody undercurrents.

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 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.

Color-coded signs direct drivers on a network of routes designed to avoid Pittsburgh traffic.

When oil was discovered just outside of Pittsburgh, the city became home to this regional stock market.

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

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

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

Once the most painted on object in the world, this short campus fence is well on its way to being so again.

Sections of the iconic limestone columns have been left uncleaned as a reminder of the city's polluted past.

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

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

This plaque marks a place where one of Hollywood’s most famous dancers got his start.

A take-out restaurant that only serves cuisine from countries with which the United States is in conflict.

A portion of the old Pirates stadium over which a defining home run once flew still stands even after the rest of the stadium was torn down.

The largest clock face in the United States is twice the size of Big Ben and infinitely more ad-sponsored.