Barcelona’s Bunkers del Carmel is becoming a popular place for tourists and locals. I was there one evening to take photos of the city at night and the place was full of people. I was also there during the day and there were only a few other people. It is an ideal place to bring a picnic and stay to enjoy the city views for a while. You will also want to bring your camera to get some amazing pictures of the city and the sea. I think the views from here are substantially better than the views from Montjuic. It is a lot farther from the city center, but worth the trip. There is no shade, so you may not want to go in the middle of the afternoon on the hot summer days.