I'm guessing just about every city, town or village that has a bridge with wire fencing has it's collection of "Lovelocks". Love messages are engraved on the locks and the love pair finds a place on the bridge, make their love vows, seal the locks and then throw the keys over the bridge. It's fun, when crossing this bridge, to stop and read some of the love promises. I wonder how many of those promises have already been broken.