Earthworks are facinating to me. In Ohio there is the serpent mound, which aligns with star patterns during the solstice. Nearby is a native american fortress o

Earthworks are facinating to me. In Ohio there is the serpent mound, which aligns with star patterns during the solstice. Nearby is a native american fortress on a hilltop, with earthen walls and "doorways". What I always take away visiting these sites is how at one point, these people realized that they could actually change their environment to suit them. They no longer had to wait for nature to provide, they could be proactive. Seems for granted now but at the time, what power they must have felt.