Somewhere in Castro Valley this empty oval is seeking attention.
Do you know where it is and what it used to be?
Please post your answer in the comments section below.
Thanks to Analisa Harangozo for sending in this visual teaser.
Last week's photo of a recycling symbol was correctly identified by Nathan.
The image was contibuted by Chris.
Have your own photos around town that you'd like featured? Send them to editor firstname.lastname@example.org and see if you can stump the Valley
About this column: Every week or so, we'll test your knowledge of places and things in Castro Valley. To browse puzzles from past weeks visit our archives.