Born at the foot of the pech de Bugarach, the Agly cuts through the limestone, sculpting spectacular and atypical morphologies.
10 million years ago, it began its erosive work and cut deeply into the rock, notching the northern flank of the great gutter that is the Fenouillèdes syncline.
Unraveling and shaping dizzying thicknesses of rock, the Agly today flows along the bottom of the gorges. The walls of this geological site, “stripped” over 5 km in length and nearly 600 m thick in places, reveal evidence of past geological history, closely linked to that of the Pyrenees.
The Agly then shaped the clue de la Fou before making its way to the Mediterranean Sea to flow into it at Le Barcarès.