A mystery
finally unveiledFor a very long time, the Fontestorbes fountain remained a real mystery… Classified as a natural site in 1921, its waters cascade from a monumental porch in a cliff face. The spring flows steadily most of the year, but when the water level is low, the resurgence is intermittent in ways no one could explain.
It wasn’t until 1965 that the cause of this curious phenomenon was demonstrated by Alain Mangin, an engineer at the CNRS in Moulis. He explained the interruptions by the presence of a pipe with an air intake upstream.