The Yellowstone Caldera is a large volcanic system located in Yellowstone National Park, primarily in the U.S. state of Wyoming. It was formed during a series of massive volcanic eruptions over the past 2.1 million years, with the most recent eruption occurring about 640,000 years ago. The caldera is approximately 30 miles (48 kilometers) wide and is filled with geothermal features, including hot springs and geysers. The caldera sits atop a hotspot, where molten rock from deep within the Earth rises to the surface. This geological activity creates unique landscapes and supports diverse ecosystems. The Yellowstone Supervolcano is closely monitored for any signs of volcanic activity, as it has the potential to impact the surrounding environment significantly.