When I visited Yellowstone National Park, I learned that there was one river that flowed over the exact point where the massive supervolcano would erupt from (if it ever does), OR where fault lines / tectonic plates abutted and where the park’s “Big One” earthquake epicenter exists.
I have completely forgotten what that spot is called, but it had a name. I think it was at a point in the river called the “xxxxx Rapids” or “xxxxx Falls.”
I can’t recall which river it was, but I am actually asking what the name of that exact spot is. Online research reveals nothing, but this site has a helpful map of the park’s rivers.