Spain
Barcelona
Plan around timed tickets for the Sagrada Família and Gaudí's houses, with practical notes for your first days in the city.
Barcelona is easier if you book Gaudí's buildings before you go. The Sagrada Família sells timed tickets online only, with your name on each ticket, and Casa Batlló and La Pedrera are a short walk apart on Passeig de Gràcia. Use the ticket guides under Plan your visit, then fit the rest of the city around those timed entries.