This video appears on a blog called “Devil’s Pool is Really Cool.”
Here’s an excerpt from the author Roddy von Seldeneck on how Devil’s Pool might have been created.
Between 450 and 350 million years ago God said, “Hey, I want a really sweet place to cliff jump near the Wissahickon River (of course it was not called the Wissahickon back then, maybe He called it “The Semi Muddy Slowmoving River”) that isn’t as dirty as the Wissahickon.”He then worked his magic on the rock in the area and POOF!!! Devil’s Pool was ready to be filled. I am sure it took a few days for the water to rise, but when it did, God was might pleased with his handiwork.