Royal Caribbean recently announced exciting plans to develop private islands around the world called the Perfect Day Island Collection.  The cruise line expects to include islands in Asia, Australia and the Caribbean. The program will start with the upcoming relaunch of CocoCay in the Bahamas.   The private island is receiving a $200 million upgrade that includes a pair of water towers with 13 water slides, an aquatic obstacle course for children and the Caribbean’s largest freshwater pool.  Other notable additions include a 1,600-foot zipline with a water landing and Up, Up and Away, a helium balloon that will soar up to 450 feet to provide a bird’s-eye view of the blue Bahamian waters.  The beach areas are also being redone with cabanas, daybeds and lots of new activities such as volleyball, glass-bottom kayaking and zorbing in an inflatable zorb ball.  A more upscale venue, Coco Beach Club, will offer what RCCL says are the first overwater cabanas in the Bahamas.  The current timetable calls for some of the features to open this September with the majority open by spring of 2019 and Coco Beach Club by November 2019.