Yellowstone National Park, designated as the first national park in the United States in 1872, is renowned for its unique geology and stunning natural beauty. Among its most famous features is the Grand Prismatic Spring, the largest hot spring in the U.S., which measures 300 feet wide and 120 feet deep. Aerial photographs reveal the spring's striking colors, with a vibrant blue pool surrounded by orange mineral-rich silt, created by thermophiles, microorganisms that thrive in hot environments. The park spans 2.2 million acres and contains over 100,000 hydrothermal features and approximately 500 geysers, making it a significant natural wonder. Additionally, Yellowstone is home to bison, the only place in the lower 48 states where they have continuously resided since prehistoric times. The park also holds historical significance, as Native American communities have lived in the area for over 10,000 years. In celebration of America's 250th anniversary, National Park Week will feature events across the country's national parks in August.