Shopping Walnut Creek All American Signs Closes in Downtown Walnut Creek July 12, 2013 11:30 am 1601 N. Main St, Walnut Creek All American Signs has closed their Walnut Creek location along with that giant fish tank in their window on N. Main St. in downtown Walnut Creek. Their Dublin location is still open. Check out their website here. openings and closings Previous Post Sign of the Day Next Post Confidential Investigative Report about Lesher Center Employee Released