Beasuty Pool, a hot spring in Yellowstone National Park
George Marler
Yellowstone National Park Service, retrived from <a rel="nofollow" class="external text" href="http://www.nps.gov/archive/yell/slidefile/thermalfeatures/hsandterraces/upper/page.htm">Yellowstone Digital Slide File</a>, <a rel="nofollow" class="external text" href="http://www.nps.gov/archive/yell/slidefile/thermalfeatures/hsandterraces/upper/Images/05914.jpg">05914.jpg</a>