It has erupted with tremendous force several times in the last two million years. The caldera is considered a dormant volcano. Yellowstone Lake is one of the largest high-elevation lakes in North America and is centered over the Yellowstone Caldera, the largest super volcano on the continent. Yellowstone National Park spans an area of 3,468.4 sq mi (8,983 km 2), comprising lakes, canyons, rivers, and mountain ranges. Hundreds of structures have been built and are protected for their architectural and historical significance, and researchers have examined more than a thousand archaeological sites. In 1917, the administration of the park was transferred to the National Park Service, which had been created the previous year. Army was eventually commissioned to oversee the management of Yellowstone for 30 years between 18. Department of the Interior, the first Secretary of the Interior to supervise the park being Columbus Delano. Management and control of the park originally fell under the jurisdiction of the U.S. While Native Americans have lived in the Yellowstone region for at least 11,000 years, aside from visits by mountain men during the early-to-mid-19th century, organized exploration did not begin until the late 1860s. It is part of the South Central Rockies forests ecoregion. While it represents many types of biomes, the subalpine forest is the most abundant. The park is known for its wildlife and its many geothermal features, especially the Old Faithful geyser, one of its most popular. and is also widely held to be the first national park in the world. Yellowstone was the first national park in the U.S. It was established by the 42nd U.S. Congress with the Yellowstone National Park Protection Act and signed into law by President Ulysses S. Yellowstone National Park is a national park located in the western United States, largely in the northwest corner of Wyoming and extending into Montana and Idaho.
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