The duration of cultural and historical experiences in Barcelona varies significantly. A comprehensive tour of a single site, such as the Sagrada Familia or the Picasso Museum, can take anywhere from 1 to 3 hours, while a full-day itinerary may encompass multiple attractions across the city. To fully absorb Barcelona's historical depth, visitors should allot several days. Self-guided audio tours provide a time-flexible option to explore at one's own pace, perfect for tailoring to individual schedules.