International Space Station's View of the Susquehanna and Appalachian Ridges

From ninety miles up. For Penn Staters: on the left side of the image you can see the 322 bridge across the river at Duncannon, where it then starts following the Juniata. You can appreciate how what SEEM like conical mountains as you're driving along are revealed to be just the ends of ridges, dissected by one of the oldest rivers in the world. There is a mountain in central-western PA you can see from the turnpike - only westbound - which looks like a conical mountain that my family officially named "Tit Mountain", which turned out to be another ridge. (There are conical mountains in PA but they are very old and at this point very very worn-down, and they are indeed volcanoes - but there's really only one of them that you can notice as stand-alone.)