Source du Bief de la Ruine et Creux des Joyaux

The Bief de la Ruine spring :

The Bief de la Ruine is an intermittent stream that takes its name from the hamlet of Les Ruines, and only comes to life after heavy rain or when the snow melts.

It is only when the underground network of the stream reaches saturation and "overflows" that the water manages to make its way between the limestone walls of the massif, allowing the reach to flow in an impressive waterfall.

Its source is in the heart of a limestone cirque. The watercourse runs under the Bayard before bursting out, sometimes very suddenly, under the rocky porch. It is made up of a succession of remarkable natural sights, including the Creux des Joyaux, which is accessible via the stream bed when the water level permits (Warning: you may be surprised by the sudden onset of water and rock falls are frequent. It is forbidden to go there in the event of flooding).

Le Creux des Joyaux :

Le Creux des Joyaux is often dry. But when the Bief de la Ruine is in flood, the stream gives rise to a waterfall, which, along with the current, causes the sand and pebbles in the "hollow" to swirl around. Once the water is clear and peaceful again, the "jewels" sparkle in the sunlight.