The establishment of Yellowstone National Park in 1872 marked a significant milestone in environmental conservation and the preservation of natural beauty. Stretching across Wyoming, Montana, and Idaho, Yellowstone contains various geothermal features, including the famous Old Faithful geyser, and boasts breathtaking landscapes characterized by mountains, forests, and rivers. This area had long been recognized for its unique natural phenomena, attracting explorers and researchers, including naturalist John Muir and others, who advocated for its protection. As the first national park in the world, Yellowstone set a precedent for how societies value and manage natural spaces. The United States Congress, influenced by these advocates, passed legislation to create the park, and President Ulysses S. Grant signed it into law, ensuring its protection against commercial exploitation and development. The park's establishment also sparked a movement towards creating additional national parks, both in the United States and worldwide, as people began recognizing the importance of preserving natural spaces.