Grand Cayman, Cayman Brac and Little Cayman. The largest, Grand Cayman has a cosmopolitan vibe, gourmet restaurants, world-class diving and the famous Seven Mile Beach. Cayman Brac is a nature lover's heaven of stunning diving and breathtaking walks along the rocky bluff. The smallest island, Little Cayman is home to just 150 people. Visitors enjoy the relaxed atmosphere and diving, especially Bloody Bay Wall, considered one of the world's best wall dives.