"Where the ducks walk on fish."

A tradition unlike any other, this marks the site of the annual Groundhog's Day tradition.

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

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

A stone arch leads to a cavernous 1930s spring house tucked away in the Pennsylvania woods.

A preserved 18th century homestead in Western Pennsylvania marks the spot where the Whiskey Rebellion began.

With 3,000 bikes on display, the world's largest bicycle museum includes some famous rarities.

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

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

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

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

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

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

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

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

Once used to screen films for theater owners to rent, this historic building is now a start up hub.

Hundreds of protractors affixed to surfaces all over the city.

This Old Testament garden features 100 plants from biblical times.

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.

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