Here is a picture of the most effective map known to mankind.... Yellow arrows painted on random things! We will be watching for these arrows on rocks, walls, shops, roads, dogs.... Wait, strike that last one. Another symbol that we will be looking for is the shell pictured on the top of this marker. The shell represents many people coming together at one point, because there are many ways to arrive in Santiago de Compostela. Most pilgrims (hikers), carry a shell on their packs during the hike.