Parque del Laberinto de Horta

Located far from the center, in the district of Horta Guinardò, this garden is the oldest of its kind in the city. It is a good place to spend a lovely morning or a lazy afternoon: you can lose yourself in the labyrinth that gives the name to the park, sit on a bench close to a statue (and maybe feel a bit of an artist trying to draw it in your notebook), have a long walk in the romantic part of the garden, or maybe relax for a while close the small waterfall. 

Few tips: 
- the entrance is free (or at least it was when I went on sunday this summer... to be sure, check before on the link I've given)
- the easiest way to arrive is to take the metro L3 to Mundet and from there walk a bit