We learn about the invaluable role of bridges when a catastrophe strikes. A flood that washes away a bridge turns what seemed certain into a considerable logistical problem. Without bridges, cities can be cut off from the world. Ultimately, this is what the builders of moats separating castles from the plains aimed for. Bridges are also the objects of longing for lovers and the final structure for those contemplating suicide. Bridges, after all, are metaphorical connections between groups of people who move from one side to the other, finding themselves in their intended place. Transformation.