I have gone zip lining before but it was more of an obstacle course and less of a longer zipline. Going zip lining over the ocean would be beautiful and really fun because you would land in the ocean and it would just be really pretty and fun!
Gone snorkeling in Culebura Island in Puerto Rico. one of my best experience and joy that ive gone and done. I think everyone should go to that Island to camp out at night and snorkel, put it in your bucket list for sure!