I only recommend walking around the Barceloneta beach at sunset, there are fewer people and in the fall and spring seasons is very nice to sit on a terrace watching the sea and entertaining yourself with the activities of the area.
La Parada is an outdoor art gallery, art accessible to all. It is located in the market of Gracia, there are photographs and books next to the typical market products as tomatoes, bread, artichokes..It’s a really nice place.
Espai Joliu is a plant concept store, coffee shop and art gallery. Don't miss out their delicious ecological homemade cakes while browsing one of their magazines or buying a plant.