Yellowstone Scenic Views - dogs-at-work
This is a reflection of the far away trees, not upside down photo.  A very large hot spring where the chemicals in the water and the heat allow bacterias to grow, they make these fantastic patterns.

This is a reflection of the far away trees, not upside down photo. A very large hot spring where the chemicals in the water and the heat allow bacterias to grow, they make these fantastic patterns.