This Costco stands out from the rest because of its impressive garden center, which is open February through September. At this membership warehouse club in Rohnert Park, there's an optical department with an on-site optometrist, a hearing aid kiosk, photo center, tire sales and installation and a pharmacy in addition to its inventory of general merchandise. The store is clean, expansive and well-lit. Costco has different tiers of membership levels depending on your personal and business needs. Additionally, it offers members gasoline at discounted rates.