Bacteria forming run-off pools, Grand Prismatic Spring in Yellowstone National Park, Wyoming Photograph of Photo of Image of

Bacteria forming run-off pools, Grand Prismatic Spring in Yellowstone National Park

Bacteria forming pools, Grand Prismatic Spring area

Yellowstone National Park, Wyoming

August 23, 2007

Canon 5D, 24 - 105 mm @ 65 mm

Size of Original: 4368 x 2919 pixels