We all know that the crossroads inn is the location of pivotal scenes: Nymeria bites Joffrey nearby; Catelyn takes Tyrion prisoner; Sandor and Arya kill some people from Arya's revenge list; and Brienne meets Gendry and slays two of Arya's demons. While the site of the inn puts it at the perfect location to mark turning points in the story, There has to be a deeper meaning. Why would Septon Meribald spend so much time relaying the detailed history of the inn unless that history carries meaning?