EOS 60D | EF-S 10-22 @15 | 6s | f/11 | ISO 100 | Marumi CPL | Lee 0.6 ND
Stopped by a small spring in Yosemite National Park. I thought it was quite interesting. This pool just flows up from the ground, then cascaded down a few small falls into another small pool that then flows back underground (although the second time could be due to road construction) and finally down into the Merced river.
The Moss on the rocks was quite a deep shade of green and the leaves from the trees just helped to accent what was otherwise an already beautiful small scene.
Update 12-08-2011: Updated with a more detailed version.