I was guessing it would be somewhere in southern Italy or in the Carribeans...
Note: I'm asking, HYPOTHETICALLY, what REAL-WORLD place was INSIRED (NOTE THE WORD "INSPIRED"!!!!) by "Isle Del Fino"!!!! I don't want bull$#!t such as: "Well, technically they're in Mushroom Kingdom world, so it wouldn't really exist...etc." Please, pay more attention to my question. <=)
(Oh, and don't flame me for NO APPARENT REASON or for being a video-gamer despite my age, etc.)
Answer on In the video-game. Super Mario Sunshine, what real-world place was inspired by the "Isle Del Fino"?
I have no clue but that game was awesome!