Grand Canyon National Park spans 1.2 million acres and features four rims: South, North, East, and West. The South Rim is the most accessible and popular, with viewpoints like Mather Point, Hopi Point, and Desert View Watchtower. Activities include hiking (Bright Angel and South Kaibab Trails), mule rides, rafting, and ranger programs. The North Rim offers solitude and alpine scenery. The West Rim (outside NPS) features the Skywalk. Visitor centers, shuttle buses, and lodging available.