Steepest flood safety railway in the entire world.

Remember and reflect at this 9/11 memorial site.

Tucked into Pittsburgh’s North Side, the Mattress Factory is a labyrinth of permanent, room-sized installations where artists transform entire spaces into mind-bending, immersive worlds.

The legacy of baseball great Roberto Clemente is preserved in a retired Pittsburgh fire station.

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

Pittsburgh’s largest and most detailed model train display began as one WWI veteran’s hobby.

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

The souvenir got the company’s founder out of a pretty pickle at the World’s Fair.

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

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

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

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

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

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

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

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

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

This icon of the Atomic Age now lays dormant.

A steel skeleton is all that exists of what is supposed to be a replica of Noah's Ark

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

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

The actor best known for slapstick comedy is memorialized in his home town.

Pennsylvania's largest cave in Laurel Highlands becomes its first underground state park.

Chase waterfalls, hiking trails and more.