I found La Fontaine de Jouvence and it is in Florida in Saint Augustine. When the Spanish conquistador Ponce de Leon first set foot in Florida, he noticed that the Taino Indians all drink drinking water from the same source. He also notes that they are stronger and healthier than the Spanish. And since they all drink the same water, he is convinced that it has special virtues and helps to stay young....
That's how the legend of the Fountain of Youth was born! It was then exported to Europe and the world.
The location of the spring has been preserved and you can still drink water at the famous fountain! Visitors all drink a small glass of water by play but also by superstition to stay young. You never know! You never know! So I experienced it myself to play the game and hope it would work! But, beyond the legend, the site of the fountain is very interesting because it recreates the life of the Florida Indians and the dwellings as they were at the time of the arrival of the Spanish. Also worth seeing: the film of the small planetarium to understand everything about the orientation of explorers thanks to planets and stars.