The natural landmark located in Arizona is the Grand Canyon. This immense canyon, carved by the Colorado River, is famous for its stunning vistas, intricate geological formations, and rich history. It measures over 277 miles (446 kilometers) long, up to 18 miles (29 kilometers) wide, and reaches depths of over a mile. The Grand Canyon is a UNESCO World Heritage site and attracts millions of visitors annually for hiking, rafting, and photography.