Lock your love up at the lover's bridge
It’s called Pont des Arts. Bring a lock, write your names on it, lock it on the bridge and throw the key into the river. Extra points if you hit a boat. Jackpot if you hit someone on the boat.
You don’t have to bring anything actually. Everything is for sale at the bridge now: lock and sharpie!
Pont des Arts, Metro Line 7, Station Pont Neuf.