The Fontaine de Vaucluse is a karst spring in the commune of Fontaine-de-Vaucluse, Vaucluse department.
It is the largest karst spring in metropolitan France by flow, and fifth largest in the world, with annual output of 630,000,000 to 700,000,000 cubic metres of water.
The spring is the prime example in hydrogeology of a "Vaucluse spring".
Address 84800, France
Coordinates 43°55'4.44" N 5°7'57.775" E