PHOTOS: 20 of the absolute best views of Dayton you just can’t see from the ground
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Serpent Mound's coiled tail has alignment with the summer solstice sunset. Serpent Mound is the largest surviving ancient effigy mound in the world and is on the National Register of Historic Places. It is located near Peebles, Ohio on State Route 73. TY GREENLEES / STAFF