Serpent Mound is the largest "serpent effigy" known to man. It is a 1/4 mile long mound shaped like a snake and located in Adams County, Ohio. The head of the serpent is aligned to the summer solstice sunset and the coils point to the winter solstice sunrise and the equinox sunrise. Visitors to the site walk along a footpath surrounding the serpent and experience the mystery and power of this monumental effigy. A public park for more than 100 years, Serpent Mound attracts visitors from all over the world. The museum contains exhibits on the archeology of the mound and the geology of the surrounding area.