Morning glory rainbow pool, yellowstone national park

I've been scared of yellow stone national park ever since I saw the film "supervolcanoe"

Yellow stone is home to the largest active volcanoe in the world for now it has yet to erupt but if it did more than half of the worlds airports would be shut down

is it true that the pool is only blue because people have been throwing pennies in there?

Been there twice. Always looks beautiful

Dive into it! :D
Unless of course it's boiling water

Looks like a LGBT only sauna.