My family and I booked a skip the line tour for Park Guell & Sagrada Familia through Viator (the tour was operated by Julia Travel, a big tour company in the region). We were very unimpressed by our guides, but the attractions were amazing. Strolling the streets of Park Guell is literally like walking through an aging fairy tale come to life. The vision anyone has to have to come up with a design like this, let alone execute it, is astounding. Imaging had people bought houses in this area, they’d be worth a fortune now!! La Sagrada Familia was by far the highlight our trip. Highly suggest buying a front of the line pass or doing it with a tour group. Between the intricate frescos outside the church to the massive arches and gorgeous stained glass inside, this is an awe inspiring basilica!