Shopping Walnut Creek Metamorphosis Spa Closes in Downtown Walnut Creek February 25, 2014 8:30 am 1631 N. California Blvd, Walnut Creek The spa Metamorphosis has closed in downtown Walnut Creek at the Mercer apartment complex. There are still quite a few salons on this block and Starbucks opened a few doors down yesterday. Previous Post Romp Through the History of Contra Costa County at Swan's Fine Books on Mar 6th in Walnut Creek Next Post Preview of The Cooperage Opening this Sunday, Mar. 2nd in Lafayette