Stand at the edge of time itself with a self-guided audio tour of the Grand Canyon, exploring two billion years of Earth’s history carved into the most spectacular landscape in America. Walk the South Rim’s thirteen-mile trail past viewpoints where the canyon stretches a mile deep and eighteen miles wide, with the Colorado River glinting far below. Watch sunrise paint the rock layers in amber and gold at Mather Point, then follow the Hermit Road to Hopi Point’s famous sunset panorama. Discover the stories of eleven Native American tribes who have called this canyon home for millennia. Stand in Mary Colter’s Desert View Watchtower, explore the elegant El Tovar Hotel built in 1905, and learn how John Wesley Powell’s daring 1869 expedition first charted these waters. From Kaibab limestone at the rim to ancient Vishnu schist at the river, every layer tells a chapter of the planet’s story. Whether you hike Bright Angel Trail or gaze from the rim, the Grand Canyon will forever change you .