This shrine to McDonalds' most iconic sandwich holds a 14-foot tall burger.

The last funhouse of its kind, where guests enter through the mouth of an 80-year-old blue whale.

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.

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

One of the steepest streets in the United States makes an intriguing challenge for cyclists.

A soon-to-be-forgotten roadside spectacle loaded with local lore.

Behold the rickety wooden glory of the world's oldest operating roller coaster.

This dramatic rail curve was once the target of a failed Nazi attack.

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

Memorializing an American tragedy of massive proportions.

Steepest flood safety railway in the entire world.

This Pennsylvania cave holds evidence of the oldest known inhabitants of North America.

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

This historic furnace was once used to produce cannonballs during the Civil War.

The penultimate and final resting places of British General Edward Braddock—minus a few bits and pieces.

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

A larger-than-life statue of America's favorite sundae marks the place it was invented.

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

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