The Blandas Causse is a relatively high (up to 1000 metres in places) limestone plateau, made up of rock left by the sea 140 to 170 million years ago. The river Vis has carved its way through approx. 20 km of countryside, creating cliffs up to 300m deep.

The river goes underground at Alzon and reappears spectacularly several kms downstream : the force of the water powered two mills until1907 (renovated and accessible by foot, see the leaflet "walking activities").

The Vis created the Cirque (ox bow lake), notably the limestone island in the middle. Several thousand years ago the river ran where the cultivated land now lies, but the meander is now dry.

The village of Navacelles in the bottom of the Cirque is one of the oldest and prettiest in the gorges of the Vis.
The waterfall and clear water in the centre of the village are inviting to swim in, but be careful : it's cold!
Further upstream there is a single arched donkey bridge crossing the river. The ruins of the "Chapelle Notre dame", built in 1286 are also at Navacelles. Au centre du village, la cascade avec son eau très claire appelle à la baignade, mais attention, elle est froide.
Un peu en amont, un joli pont muletier à une arche enjambe la rivière. On peut aussi découvrir à Navacelles les ruines de la "Chapelle Notre Dame" édifiée en 1286.

To get there : from Le Vigan Navacelles is well sign posted. Follow the D999 towards Millau and then after 1km turn left along the D48. As you leave Montdardier follow the D113 to Blandas. The viewing point for the Cirque is 1.5 km further on.

Map La Foux, the resurgence of the river Vis and the mills

The source of the Vis is just below the col (hill) des Tempêtes (971m) in the Lingas massif. The river makes its way towards the limestone plateau of the Causse where it has forged an enormous canyon 27kms long and 800m wide.

The river runs underground from just below Alzon, to re-emerge in a spectacular waterfall upstream from the Cirque de Navacelles : this is the resurgence of the Vis, la Foux. Its force, 3m³/second, has been used for centuries : a manuscript dating from 1097 records the presence of a water mill at this site.

The restored mills standing today were built in the 17th century and ceased functioning after the severe floods of 1907. There are permanent information boards in the mills and it is free to go in. The resurgence at la Foux is a beautiful spot to visit : in summer it is refreshingly cool, in spring and autumn the river is at its most powerful and in winter the area is decorated with frost.

Very occasionally the water stops flowing, from a period of several hours up to a few days. According to the legend there is a stone tablet in the bed of the resurgence bearing the inscription "Quoras me vieras, plorasas" (Occitan meaning "when you can see me, cry").