After leaving Hvar I am going to Dubrovnik for 4 days. I am thinking on hiring a boat ,as we are a group of 6 to do a day trip . I have read some day trip suggestions here on TA like Elaphiti Islands, Mjlet,Lokrum, Korcula etc... If you have to recommend just one of them, which one you would say it's a MUST GO " ? We are looking for a good swimming, stunning landascapes ,beatiful beaches.