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Dr. Doc: Yellowstone-- West Thumb Area 2004
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Dr. Doc: Fishing Cone Geyser, West Thumb, Yellowstone
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Dr. Doc: Old Faithful Geyser, Yellowstone
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Dr. Doc: Lower Basin, Old Faithful area, Yellowstone
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Dr. Doc: Morning Glory Pool, Yellowstone
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Dr. Doc: Biscuit Basin, Yellowstone
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Dr. Doc: Marmots, Old Faithful Area, Yellowstone
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Dr. Doc: Daisy Geyser, Yellowstone National Park, 2004
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Dr. Doc: Daisy Geyser, Yellowstone National Park, 2004
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Dr. Doc: Old Faithful Area, Yellowstone
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Dr. Doc: Bison Herd. Firehole River Area, Yellowstone
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Dr. Doc: Baby Bathtub Spring, Yellowstone
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Dr. Doc: Diadem Spring, Yellowstone
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Dr. Doc: Grand Prismatic Spring, Yellowstone Nat. Park, WY
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Dr. Doc: Grand Prismatic Spring, Yellowstone Nat. Park, WY
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Dr. Doc: Mammoth Spring, Yellowstone Nat. Park, WY (USA)
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Dr. Doc: Mammoth Spring. Yelllowstone National Park
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Dr. Doc: Mammoth Spring. Yellowstone Nat. Park, WY (USA)
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Dr. Doc: Mammoth Hot Spring, Yellowstone
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Dr. Doc: Mammoth Hot Spring Area, Yellowstone
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Dr. Doc: Mammoth Hot Spring, Yellowstone
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Dr. Doc: Yellowstone River, Calcite Springs Area
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Dr. Doc: ROOSEVELT ARCH- YELLOWSTONE
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Dr. Doc: Mammoth Hot Spring, Yellowstone
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Dr. Doc: Yellowstone Bison
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Dr. Doc: Lone Star Geyser, Yellowstone
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Dr. Doc: Lone Star Geyser, Yellowstone
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Dr. Doc: Lake Yellowstone, Yellowstone National Park
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Dr. Doc: Lower Falls, Yellowstone National Park, 2004
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Dr. Doc: Grand Prismatic Spring, Yellowstone, 2004