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.

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

Hundreds of protractors affixed to surfaces all over the city.

The Master of Magnetism dominates the walls of a scrap metal yard to keep graffiti artists at bay.

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

The last street in Pittsburgh that's paved with wood.

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

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 Old Testament garden features 100 plants from biblical times.

This church in Pittsburgh is home to the largest collection of religious relics in North America.

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

A giant ball made from pieces of an old Jeep.

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

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

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.

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

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

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

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

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

Constructed from the ruins of a former glass factory, this park incorporates the old with the new.

Ghost stories surrounded this “castle,” the only structure from a huge mansion that was never built.

The largest ancient burial mound in Ohio.