If you’ve ever wondered where they get the water to make those colorful freezer pops, it’s Yellowstone National Park. This is the ambiguous “berry” pool.
Actually, I think this is from copper, but I could be wrong. Either way, there are enough minerals in the waters of the park to -… I can’t think of a good analogy, but there are a lot. Yellowstone has water that you have to chew. It’s all brought up by the geothermal activity in the region, a mantle plume of molten material that comes a lot closer to the surface than most other areas of the world, save for active volcanoes. Or, maybe not.
By the way, geologists have said that there’s a potential eruption building under the park, and the entire area is actually higher in elevation than it was a few decades ago. It’s even visible here – doesn’t this look closer to you?