City Sightseeing offers you the best option to do tourism in Barcelona. Discover what to do and what to see in Barcelona on our hop on hop off official tourist bus! Barcelona has plenty of tourist attractions to discover and explore, and we know it is hard to decide which one to visit! Yet, there are some spots you cannot miss. A visit to Sagrada Familia Cathedral is almost mandatory if you visit Barcelona, and Bogatell Beach and the beautiful Plaza de España ('Spain Square') are other two must-see attractions you can enjoy on our City Sightseeing Barcelona Official Tour Bus!