Private islands come in all shapes and sizes and can cost anywhere from $200,000 to $200 million, depending on what you're looking for. However, buying an island and building on it is a major investment of both time and money, so it's important to find the right one that's worth waiting for.

There are tens of thousands of private islands in the world, ranging from a few dozen square feet to hundreds of square miles. Usually, they are governed by the laws of a nearby country but restricted to use by the owner alone.