There was one more thing we had to do before leaving Paris...
We picked up a lock at the Monoprix near the apartment (cheaper than the ones being sold at the bridge), and we stopped at Pont de l'Archevêché ("bridge of the archbishop") behind Notre Dame to attach our lock.
I wanted to draw a really cool design on it, but in the end, I kept it simple. Lia & Brandon. Hearts.
We put it on the railing closest to Notre Dame and to the bottom left side, closer to Shakespeare & Company. The keys are somewhere at the bottom of the Seine.