Fountain of love

I walked by a beautiful fountain in an area called "Paseo Bravo". This area was founded in the 17th century. It has a rich history and has been know to be a cementary and gallows in the past. Now it´s a pretty park area. The fountain has some moss and people have found a way to write things in it. Most of which, are hearts and love promises. How did they make these marks? Did they walk in the fountain, or maybe just use a long stick? Whichever way, they left a mark that captures a probable romantic moment in their lives. Have you ever left a romantic mark of your own?