Private Tour Barcelona Sagrada Familia Facades. Learn more about Barcelona’s most famous building, the Sagrada Familia, during this 90-minute private walking tour. Discover the facades and history of the church from your tour guide as you explore the detailed exterior. Learn more about the building’s famous architect, Antoni Gaudi, and how he got his inspiration for this architectural masterpiece. Book with us and Save 15%! Private Tour Barcelona Sagrada Familia Facades.