We wouldn't dare set foot on them even if we could, making a total of thirteen islands where humans are banned.
In a perfect world, what kind of vacation would you take?
That's a very big question, and it's one that frequent flyers often have to answer.
In my experience, it is really individual.
Do you have a preferred location abroad and keep coming back to it year after year?
Alternatively, maybe you never return to the same location again.