In the United States, the National Parks system was established to protect the country's natural beauty and cultural heritage. The first national park, Yellowstone, was created in 1872 and was designated to preserve its unique geothermal features, wildlife, and landscapes. Since then, the National Park Service has grown to include over 400 sites, which encompass not just parks but also monuments, recreation areas, and historical sites. Each national park offers visitors opportunities to explore nature, enjoy outdoor activities, and learn about the local flora and fauna.