Post your guesses in the comments section below.
Guess correctly and be crowned "San Lorenzo know-it-all" for the week.
Congratulations to for being the first to correctly . The painted memorial for Frank and Mary Nelson is found on the . The memorials are as part of event which will be held in August.
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!