Pearlrige Center (renamed Pearlridge) is the second largest shopping center in Hawaii, after Ala Moana and is Hawaii's largest enclosed shopping center, located in Aiea. Opened in 1972 and expanded in 1976, the enclosed mall is split up into two separate areas (Uptown and Downtown) and overlooks historic Pearl Harbor and the USS Arizona Memorial. The property includes the only monorail in Hawaii, the only emergency clinic located on mall property (Kapi'olani Medical Center at Pali Momi), an eight story office complex (Pearlridge Office Center), and Hawaii's largest watercress farm (Sumida Farm).