The legend of the Devil's Bridge
The construction of the bridge proved long and difficult, with the Devil ruining the work done during the day every night.
This is how Guilhem made an agreement with the Devil: the latter would build the bridge himself in three days!
In return, Guilhem would offer him the soul of the first creature to cross the bridge. Seduced, Satan set to work and the bridge could be completed. There was still a poor soul to find ... Guilhem made a dog cross ...
Destroyed by so much cunning, the Devil tried in vain to destroy his work.
Out of spite, he threw himself into the waters of the Hérault, digging the "black chasm" in his fall.
This is how in the Middle Ages, pilgrims and passing people who used the bridge always threw a few pebbles into the river with the hope of leaving the Devil behind.