This path you'll follow for most of the way to the castle of le Guildo is in fact the old tramway path from Plancoët to Guilod, and then from Guildo to Saint-Cast or to Dinard.
This line stopped in 1939. It is the same kind of machine described in Bécassine for which it was necessary to get out at each stop.
At the first crossroads, you will find the very modest old train station, but typical with its bricks.
branch off right towards Créhen's village-centre.