Hi! I am very sorry in the delay for replying to your question. That's wonderful you are going to Barcelona! I wish you a wonderful journey! Buen viaje! (Have a good trip!) I recommend visiting La Sagrada Familia, which is a beautiful cathedral in construction. The architecture is amazing. Las Ramblas is a popular shopping district and the beach, Barceloneta is beautiful! I also recommend Parc Guell, which contains some of Antonio Gaudi's, a famous architect, beautiful buildings. I hope this helps and best of luck!