Grand Cayman Dolphin Swim Adventure. Book a Dolphin Swim at Grand Cayman’s Dolphin Discovery, where you’ll enjoy a belly ride in the turquoise waters of the Caribbean Sea. Experience a dolphin handshake and a dolphin kiss, the listen as these incredible marine mammals sing you a song. Don't miss out on this 30-minute interactive dolphin program, limited to 12 people for a small group experience. Book with us and Save 10%! Grand Cayman Dolphin Swim Adventure.