If you want to see a wonderful view of the entire city, without being surrounded by people, this is the perfect place. It is also a very charming place, was a former anti-aircraft bunker during the Spanish Civil War, is pretty dilapidated but retains the essential structure.
Sunny days I like to go to the Palau Robert Garden. Is an small garden placed in the middle of the city. The palace works today as an exhibition space, so after reading the newspaper under the sunshine, you can visit an exhibition. I love to go there to feel myself surrounded of abundant vegetation and the songs of the birds. It makes me be in a good mood.