Grand Prismatic Spring
Yellowstone National Park, WY, US
Don't adjust your set -- the water really is that blue #nofilter. The bacteria hanging out around the edges of the spring creates the gradient of color, and depending on the season, the hues change like some magnificent, rainbow-colored fountain of youth (c'mon, isn't this what it would look like?). Just don't try swimming in it -- the center of the spring is so hot, it's sterile.