Yesterday I visited the Reading Viaduct in Philly. It's an old elevated train line that's been abandoned, but you can sneak up onto it and explore, and as you can see by the pics, many people have before. There's a lot of gorgeous graffiti, flowers (mostly weeds, but still), and fun swings that people have rigged up. There is a conversation happening in Philly about making this into a park like the High Line in NYC (readingviaduct.org) but there are property ownership and funding issues to tackle first. Enjoy the pics!