We have a long layover in Grand Cayman on the way back from Cayman Brac, arriving at GCM early in the morning and leaving mid-afternoon. We probably ought to be back at the airport by 1:30 or 2:00. Any suggestions on how to kill some time? We had the same kind of schedule last year, maybe a little less time. We saw the Seven Mile Beach area, went shopping a little, had some lunch. We don't really need to do that again. Is there anything in particular you would recommend to do in four hours or so? Thanks in advance for any suggestions.