Fort de Peccais, Military fort in Saint-Laurent-d'Aigouze, France.

Fort de Peccais is a ruined 16th-century military work beside the salt pans of Aigues-Mortes. Its thick wall of irregular grey and tan stone rises straight from the water, its face sloping outward, with a shallow recessed channel of lighter, flatter stones running down a projecting corner. Earth, grass and low shrubs cover the flat top, and tall weeds grow where the wall meets the water.

The fort was built in 1568 to protect salt trade routes and defend against maritime threats to the region. It served as a key defensive installation throughout its operational years.

The fort's name survives in the Camargue expression 'Vaï-t'en à Peccaï', used to send someone to a far-off, desolate spot. The saying recalls the site's isolation among the salt marshes near Aigues-Mortes, where salt was harvested under the king's monopoly and taxed through the gabelle.

The fort is currently closed to visitors due to safety concerns and ongoing preservation work. Those interested in the area should check current conditions beforehand or view the exterior from a distance.

The installation once housed a chapel, water cisterns, and a bakery to support military personnel stationed at this isolated spot. These facilities show how soldiers had to sustain themselves independently in such a remote location.