Many hiking trails that punctuate the sum, crossing the bridge is probably one of the most enjoyable, it will offer you the opportunity to walk from Saint Riquier to the Bay of Somme through Abbeville ... The bay of Somme is the biggest estuary of the North of France with about 7200 ha. The very wide opening to the Channel, more than 5 kilometers, from north to south, offers, according to the tides and the seasons, exceptional landscapes where sky, earth and sea come to be confused in subtle hues and lights.