• From Ault:
Take the coast road towards Saint-Valery-sur-Somme.
Skip to Onival.
Arrive at Old Onival take the path on the left after the farm down in the swamp.
The house is right below on the right.
• From Saint-Valery-sur-Somme:
Take direction Tréport - Seas - Ault
To 14 km to the roundabout Hautebut - Woignarue.
Ault take slightly on your right by the coast road.
1 km after a large farm take the path on your right leading down into the swamp.
You have arrived