Donkey with a scallop shell and a blue scarf on its head, one of the most iconic symbols of the Camino de Santiago

donkey scallop shell blue scarf iconic symbol camino de santiago santiago de compostela pilgrimage religious tradition historical significance traveling companion walking route spiritual journey symbolic representation landmarks portuguese culture animal companionship longdistance heritage spiritual traditional attire religious route emblem cultural significance portuguese tradition icon ritual history symbol landmark portos spiritual heritage portuguese pilgrimage trail marker portos cultural heritage iconic representation scallop shell trail donkey in portuguese culture portos symbolic landmarks portos pilgrimage history religious iconography camino de santiago in porto traditional donkey attire yellow arrows shell legends the way to santiago peregrino shells tied tree porto portugal