Spirits or ghosts were said to fly along on a direct course close to the ground, so a straight line connecting two places was kept clear of fences, walls, and buildings to avoid obstructing the flitting spectres. The paths would run in a straight line over mountains and valleys and through marshes. In towns, they would pass the houses closely or go right through them. The paths end or originate at a cemetery; therefore, such a path or road was believed to have the same characteristics as a cemetery, where spirits of the deceased thrive.