sanddunes and footsteps in the sand

aeolian against bas coast colline collines contre crochet defence defend desolate different dry duin duinen dune dfendre dfense eau fluvial footsteps formed formes grass gographie herbe hill hills loose lost mer monde mto natural nearby netherlands pays pluie proces processes proximit rain rivage sable sand sanddunes sea seawater sec shapes shoreline storm tailles tempte traces upcomming vent venteux weather wind windy world coulement