The pilgrimage around Iona visits places of sacred significance and historical importance on the island.  There are 18 sites in all and can take nearly all day to get to each one.  Our group broke the pilgrimage up in a few days-hitting the Abbey's specific spots while we did our tour and hiking up Dun I on a quiet afternoon-so that we could enjoy the heft of the hiking down to the south end of the island to really spend some meaningful time at St. Columba's Bay and enjoy the reflections at holy sites along the way.