UK 
51.5072° N, 0.1276° W

On the other side of Ceriso, where the black rock begins, about a mile from the spring, is the work of an older, forgotten people. The rock hereabout is all volcanic, fracturing with a crystalline whitish surface, but weathered outside to furnace blackness. Around the spring, where must have been a gathering place of the tribes, it is scored over with strange pictures and symbols that have no meaning to the Indians of the present day.