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. -- Totally just added this to my bucket list!
In the south of the Isle of Skye, in Scotland, you can find these magnificent Fairy Pools. With a beautiful hiking trail especially in the fall. Turquoise rivers with purple trees on the side make for a stunning view!