In the vicinity of the confluence of Brush Creek there is a noteworthy rock formation known as "Flat Rocks"; adjacent was a native Pomo village, presumably to exploit the resources of the confluence area as a suitable place for fishing, bathing, washing and providing drinking water.
At the point where Brush Creek meets another stream, there is a prominent rock formation known as "Flat Rocks," which was near a native Pomo settlement; this location would have been used by the natives for activities such as fishing, bathing, cleaning, and obtaining drinking water from the confluence area.