Travel & Places - 3 free documentaries about long walks & pilgrimages.
Start with Why Wounded Soldiers Visit Lourdes (55 min, PBS), then Pilgrimage (30 min, National Film Board of Canada). All 3 documentaries here are free to watch from their makers' official uploads. To read deeper, the top-rated book on long walks & pilgrimages is A Walk in the Woods by Bill Bryson.