The Grand Canyon is a steep-sided canyon carved by the Colorado River in Arizona, United States. It is part of the Colorado River basin, which has developed over the past 70 million years. The canyon stretches 277 miles (446 km) long, reaches up to 18 miles (29 km) wide, and attains a depth of over a mile (6,093 feet or 1,857 meters). The Grand Canyon is located in northern Arizona. The canyon and adjacent rim are contained within Grand Canyon National Park, the Kaibab National Forest, Grand Canyon–Parashant National Monument, the Hualapai Indian Reservation, the Havasupai Indian Reservation and the Navajo Nation.
The Grand Canyon is known for its immense size, fantastic shapes, and coloration. Nearly two billion years of Earth's geological history have been exposed as the Colorado River and its tributaries cut through layer after layer of rock. Popular attractions include scenic viewpoints like Mather Point, Yavapai Point, and Desert View Watchtower, all easily accessible from the South Rim. Visitors can explore historic landmarks such as the Kolb Studio and Tusayan Ruins, and attend free ranger programs. The South Rim houses visitor centers, a geological museum, and an art gallery/bookstore. The North Rim also has a visitor center, but it is closed in winter months. Grand Canyon West is another major area with tourist services.
