There are over 14,500 manufacturing establishments housed inside Pennsylvania's borders. Everything from apple sauce to Zippo lighters are produced in the Keystone State -- then shipped all over the world to be enjoyed.
I remember, as a child, watching Mister Rogers go through a factory each week on his show. It wasn't until I moved out here that I discovered Fred Rogers was a PA native and that the show was filmed in Pittsburgh, which made it easy to go down the road to the local marble/bubbles/chocolate factory.
Of course, the tours aren't reserved just for Mister Rogers' Neighborhood, but are open to everyone who wants to see how things are made. There's even one county, York, in South Central PA that hails as the "Factory Tour Capital of the World" and hosts an annual Made In America Tours Event each June.
I decided it would be fun to tour a handful of factories during the winter as the crowds are smaller and the heat from machines and ovens would be warm welcome to the weather outside. I took lots of pictures and put them together in a slideshow below.
The factories I went to were: Hershey Chocolate World / Harley-Davidson Assembly Plant / Martin & Co. Guitars / Renovah Pretzels