Ancient Sacred Well Described at Marietta, Ohio Ceremonial Enclosures

The supernatural qualities of sacred wells and springs were venerated as places of healing and divination. The proximity of the well to the sacred via and enclosures hints at its use as a ritual Druid site.

Prehistoric America, 1905
  Mr. Harris says there was at Marietta a well sixty feet deep and twenty feet in diameter, of the kind used in the early days, when water was brought up in pitchers by steps.  This well may have been for the convenience of the people at the enclosures. The proximity to the temple platforms and the conical mound and the graded way makes it significant.