At Montreuil-sur-Mer we discover that the sea is 13km away as the river silted-up in the middle ages. It must have been a slow death and presumably they didn't have any means to avoid it. We are here for a final night in France and we are almost embarrassed not to be at Gypsy Woman's site near Boulogne. I have a feeling that she'll find out but if we stay away, at least we won't know that she knows we aren't there but could have been. The campsite is below the ramparts and rather surprisingly there's a way through the walls for pedestrians. The entry and exits are about 20m apart, so there's an interesting and dark walk inside the wall to reach the other one. Once in the town we had a wander and again marvelled at huge groundworks where masses of earth have been excavated in the quest to create an impregnable 'fortress town'. The next morning we sympathise a little with a Dutch couple who have had no power overnight as they flattened their caravan b...