Barcelona started with Sagrada Familia and ended, so I only had Sagrada Familia in the afternoon, but I took a leisurely look at all the outside parts, interpret them, and go inside and go underground. I've seen all the museums. I don't regret it and I want to go again. It is recommended to buy tickets online in advance and go on time. Even though I thought it was off-season, there were so many people. I've been to a lot of cathedrals, but it's the best of them. I recommend it