In Norris geyser basin, Yellowstone National Park, I found these two different streams that are coming out of a hot spring. They are different colors and seemed to keep separate even though they are following down the same channel in the ground. I thought it made for an interesting picture. The first shot is what I think is more interesting. The second shot is focused more on the springs themselves before they channel together and mix.
I like the first one a lot. I remember those cool colors that could be found there! You captured the look of it very well, and have handled the harsh light nicely. I thought at first maybe the exposure could come down about 1/2 a stop, but the look you have here looks very close to what I remember.