Post your guesses in the comments section below.
Guess correctly and be crowned "San Lorenzo know-it-all" for the week.
Unfortunately, no one was able to correctly guess . The lamp post made from the antique water pump sits in front of a house on the corner of Via Nueva and Via Rancho.
Have your own photos around town that you'd like featured in Castro Valley Patch's photo challenge? Send them to email@example.com and see if you can stump our readers!