Where in San Lorenzo: In Honor of Mary and Frank

Brownie points to the person who can say what they're being honored for.

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 port-o-potty can be found at the edge of the old Mervyn's parking lot.

Have your own photos around town that you'd like featured in Castro Valley Patch's photo challenge? Send them to analisa.harangozo@patch.com and see if you can stump our readers!