If you're struggling to place the name (short of knowing it's a compass point), we'll help you out. North West is the daughter of Kanye West and Kim Kardashian. She's also a child. That means she didn't actually pay for this island herself, and we suspect she doesn't even know that she owns it! Most celebrities build up an estate and then hand it down to their children either after they pass away, or when they believe their offspring are old and responsible enough to deal with it. The West-Kardashians don't appear to have any such concerns.
The young West was only seventeen months old when Kardashian paid $5m to buy Turtle Island, which is off the coast of Australia. The only major development on there so far is a home, which is situated at a high point on the land to allow for a spectacular panoramic view. By the time she's old enough to spend time there alone, who knows what her parents will have done to it!