Details: The unconquerable Colorado River carved and continues to rush through the Grand Canyon. Spectacular rock formations of varied shapes and colors decorate the surrounding plateaus. The natural beauty of the Grand Canyon is truly unparalleled. One of the great natural wonders of the world, this place of enormous beauty is venerated by numerous Native American tribes, some of whom still live here. Originally established as a forest reserve in 1893, Grand Canyon National Park is one of the most visited national parks in America. See it at dawn. See it at dusk. See it in all its mid-day glory in this splendid wall calendar.