There is a highway that parallels the Colorado river for a few miles through Professor Valley. If you pull off the road and do a bit of exploring you will likely find scenes similar to this one. very large boulders calve off the canyon cliffs and end up in the river occasionally. The flow diverts around them, and along with the buildup of silt in front and behind, a short sidewater forms. When the light is right, the canyon walls reflect beautiful variations in the sandstone.