This is someone's RV that apparently landed on an island in the middle of the Susquehanna River.
These photos Mom already posted on her blog. If you click on the pictures, they will open larger so you can get a better look.
It's amazing how close this came to the Valentine's home. The creek behind their house re-routed itself through the neighbor's yard, carrying all this river rock high enough to half-bury this swing set.