You exit the highway at exit Marquise careers and turn right.
You will then arrive at a roundabout, you take direction Wissant, you go a little way and then you follow for 6-7 miles.
Before a small group of houses on the left you will see on the right a small sign "Le Colombier", you go ahead and take the first left.
You will see the panel closes the clock, Cap Gris-Nez, you follow in helping you to label the farm of the clock and you come home!