This is the autumn aerial landscape of Great Serpent Mound, the famous prehistoric relic located in Ohio, USA. This snake-shaped mound site was built by ancient Native Americans, and is a well-known prehistoric civilization landmark in North America. The winding snake-shaped earthen mound is hidden among colorful autumn forests, with a stream flowing through the woods. Sunlight forms bright reflection on the water, and winding trails weave between meadows and colorful trees, full of strong autumn vibe, distant mystery and profound historical sense.