The "great outdoors" refers to natural environments that are outside urban areas, including forests, mountains, rivers, and parks. These spaces offer opportunities for various activities such as hiking, camping, and wildlife observation. They are essential for biodiversity and provide habitats for many species of plants and animals. Spending time in the great outdoors can have numerous benefits for physical and mental health. Activities like hiking and biking promote fitness, while being in nature can reduce stress and improve mood. National parks, such as Yellowstone and Yosemite, are popular destinations for those seeking to experience the beauty of the great outdoors.