The various routes of the Camino Santiago are marked with a few easily recognised symbols. Sometimes there are scallop shells set into the ground or painted on buildings or perhaps incorporated into railings. Sometimes these are realistic
But the most ubiquitous sign is la flecha amarilla, the yellow arrow. These are sometimes professionally painted onto walls and signs. More often than not they are roughly done, placed on the backs of stop signs or on rocks or on the curbs of streets.