Tournesol is a 15-acre estate in the Coombsville AVA. It is owned by Bob and Anne Arns, who purchased their estate property in 1998. Bob Arns is principal at his San Francisco law firm. The couple was inspired to start their own wine venture by the famous 1976 Judgement of Paris, in which California wines took top honors in a Paris contest of French and California wines. Ken Bernards is winemaker. The estate makes Cabernet Sauvignon and white Bordeaux-style blends.