Spend enough time on the aspirational side of Instagram and you're likely to see someone post about the island paradise they're visiting.
To add even more to the FOMO, you may notice that these getaways are often located at private islands that only those who befriend their obscenely wealthy owners could ever have a chance of visiting.
But although that's likely true for many private islands, there are a few that are open to guests. And it doesn't cost as much as you might expect to stay at them.