I did this in Petaluma recently. It was a beautiful May morning and the sun was shining. I had seen this building from the road as I drove into town but wasn't sure how to get to it or what it was. Apparently it is one of the old buildings that used to be part of the dairy and feed mill business that is in Petaluma, north of San Francisco about an hour. The diary and main feed mill are still open, this particular building has become part of retail outfit on Main Street.