I think this is the closest we can get to a full map of The Dark Island.

I'm not sure how Diggers Deep can be positioned like that in reference to the mouth of eternal shadows or how garmadon could look over shadow bay even though the celestial clock is on no man's bluff but idk how else it wud go. Key- Temple of Light: Where Lloyd got and gave away his golden powers River of Darkness: A river which Wu floated down with The Bounty to reach the Temple of Light during The Dark Island Trilogy Billy Badlands: A desert which Kai landed in after the Ninja got seperated...