Not far from my elementary school in Simi Valley, California. This awesome formation, complete with an arch below the trunk, used to be on private property. On the ranch of the fabled old man Runkle no less. If he caught you on his land you would surely take a shotgun blast of salt rock in the rear end. Or so the legend goes. Now it is surrounded by houses but I left them out for old times sakes.
This one was quick at about 19 1/2 hours. Can’t wait to see a proof!
30 second time lapse below.