Hidden Island

[favcolimegreen]

    Hello!
I know there is supposed to be an island that can be unlocked simply by swimming or boating up to it.
However, my questions is: Where is this island located in relation to the main island?

I've boated up to all of them, and have stood on one, but the fog didn't disappear.

[grimsoul]

The island is Beryl Shoals.
You can see it's location on this page. Scroll down the page to the map and it's number 1 on the map.