The snow-covered Sierra Nevada Mountains in Yosemite National Park are apparent in this low-oblique, north-northeast-looking photograph. Glacier-scoured Yosemite National Park, site of the world’s three largest monoliths of exposed granite, also contains many lakes, rivers, streams, and waterfalls. Hetch Hetchy Reservoir, which supplies water to the San Francisco area, is located in the Hetch Hetchy Valley, evident from the bottom center to the near center of the photograph. Topaz Lake, near the upper left, and Bridgeport Lake, between the upper center and upper right, are visible in the photograph.