The watertower between Gallician and Le Cailar is located on a low hill in the flat landscape of the Camargue. As such, it is a great reference point. The hill is made of gravel, deposited by the river Rhone or one of it many arms. You can notice that the pebbles are nice and round because they were smoothened during the river transport. The river followed a large set of different patterns in this flat area, before it took its current position (not near this place). The gravel is very well drained, ideal for growing grapes. You find quite a few vinyards along this ridge.