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Tim Booth: Elk - Yellowstone NP
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Tim Booth: Lake Yellowstone Hotel
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Tim Booth: View from Lake Hotel
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Tim Booth: Old Faithful
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Tim Booth: Upper Geyser Basin, Yellowstone
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Tim Booth: Upper Geyser Basin, Yellowstone
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Tim Booth: Upper Geyser Basin, Yellowstone
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Tim Booth: Upper Geyser Basin, Yellowstone
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Tim Booth: Oblong Geyser, Yellowstone
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Tim Booth: Grotto Geyser, Yellowstone
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Tim Booth: Riverside Geyser, Yellowstone
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Tim Booth: Waiting for Old Faithful
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Tim Booth: Old Faithful
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Tim Booth: Hot spring, Yellowstone
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Tim Booth: West Thumb Basin, Yellowstone
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Tim Booth: West Thumb Basin, Yellowstone
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Tim Booth: Yellowstone River
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Tim Booth: Buffalo Bath
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Tim Booth: Buffalo around Mudpot Volcano
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Tim Booth: Buffalo Herd, Hayden Valley
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Tim Booth: Norris Geyser Basin
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Tim Booth: Acid pool, Norris Geyser Basin
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Tim Booth: Thermophilic bacteria defining temperature gradient
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Tim Booth: Thermophilic bacterial mat
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Tim Booth: Norris Geyser Basin
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Tim Booth: Norris Geyser Basin
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Tim Booth: Steamboat Geyser
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Tim Booth: Grand Canyon of the Yellowstone
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Tim Booth: Grand Canyon of the Yellowstone
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Tim Booth: Osprey Nest, Grand Canyon of the Yellowstone