If we google Fountain of Youth, Wikipedia says that there is a place called Fountain of Youth in St. Augustine, but it doesn't mean that it is THE Fountain of Youth. The other references say something about springs in Bimini (around Gulf of Honduras - according to natives), or even in the chain of the Bahamas called Exuma (according to David Copperfield). And Idk where the movie On Stranger Tides was filmed, but it looks like nobody has found the 'real' Fountain of Youth ... otherwise just about everyone in this world would have tried to come and drink from it ...
So, Jack Sparrow might have gone to Florida according to that movie, or to the other part of the Caribbean, or Hawaii, but I'd say, FoY is in 'Timbuktu' ... a place of never-never land, wherever it is ...
