the medieval bridge of echallod in arnad, over the river dora baltea in aosta valley/italy

17701776 already ancient aosta aostavalley arches architecture arnad back baltea bridge building built buttresses construction donkey donkeys dora dorabaltea echallod existed famous formed francigena green grey historical history italy landmark landscape medieval mountain nature old outdoor path resting river romanesque scenic shape stone structure style three times tourism travel tree valleyitaly valleyitalyit vegetation was water way years