A national park in the western United States known for geothermal features; named after the yellowish stones found along the river.
From the Yellowstone River, which French trappers called 'Roche Jaune' (Yellow Rock), translated from the Hidatsa name 'Mi tsi a-da-zi' referring to the yellow sandstone bluffs along the river.
Yellowstone was the world's first national park, established in 1872, creating the global template for wilderness preservation. The park sits atop a supervolcano caldera, making it one of the most geologically active places on Earth with over 10,000 hydrothermal features.
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