This is a bridge in Paris. You hang locks on it with the name of you & your boyfriend/girlfriend/best-friend then throw the key into the river. So even though the friend/relationship may end, you can’t remove the lock. It stays there forever, as relevance to someone once a part of your life.
Scaling the Eiffel Tower has a price, but the view from below is spectacular in its own right, and a perfect backdrop to a leisurely picnic in the surrounding grassy area. Be sure to visit the tower at night when it sparkles each hour with an awe-inspiring ten-minute display of 20,000 glittering white lights.