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Yellowstone National Park
The world's first national park — geysers, megafauna, and a caldera the size of a small state.
Core Biological & Field Specifications
Best season
June–September (all roads open)
Entrance
$35/vehicle, 7 days
Crowd trap
July–August midday; Old Faithful 10–4
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Grand Prismatic, Lamar Valley dawn, Grand Canyon of the Yellowstone