Cooking class over, I decided to revisit Park Retiro because I knew I'd missed a couple of things I wanted to see. I walked down Calle Moratin to Paseo del Prado where I discovered aa growing wall! The design of the wall was spectacular. There was a great variety of plants and flowers. Water dripped down the wall, almost like a waterfall! I crossed the street and proceeded to the south entrance to the park, seeing wonderful buildings and ornamentation along the way.