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!
I was planning a trip there a couple of years ago, but never got to go. I've heard that the Canadian side is better. Must get hubby a passport and update mine before we can explore the Canadian side though.