August 24, 2006 3:55 AM PDT
Crater Lake is one of the clearest freshwater lakes in the world because it contains very few nutrients and particles. Divers can typically see nearly 150 feet away, but the lake's elevation limits how far scuba divers can venture to about 100 feet. Light stops in the lake at about 600 feet.
The lake is as about six miles wide. And its water typically stays at a constant level, given the annual snowmelt and rainfall is roughly equal to the lake's evaporation and seepage.
Photo by Stefanie Olsen/CNET News.com
