The folks in Pennsylvania apparently call these the "Natural Water Slides" of Ohiopyle State Park. It's basically a series of chutes on Meadow Run Creek that you can slide down. I would say that this is probably done when the water is lower in the summer because I wouldn't go in that water the way it was flowing at the time! Then again, maybe I'm just a chicken.

Looking downstream.
Meadow Run
Ohiopyle State Park, PA
Great shot however!
Thanks so much for the comment, Lovisa.
Well, we only stayed a month, so there wasn't enough time for that