This island monastery can be reached by ferry. To attract the ferryman's attention when he is on the island, turn the white board on the jetty. The mid-13C ruins include those of the church. The west doorway is set in a deep recess (carved arch) and the chapter house shelters a double effigy tomb monument. Mary, Queen of Scots (16C) spent some time here before embarking for France, where she married the young king François II.