Post your guesses in the comments section below.
Guess correctly and be crowned "Castro Valley know-it-all" for the week.
Unfortunately, no one was able to guess . The ship is displayed on the side of the Santa Maria Village apartment complexes located along Santa Maria Avenue.
Have your own photos around town that you'd like featured in our Castro Valley photo challenge? Send them to firstname.lastname@example.org and see if you can stump our readers!