La Sagrada Familia is the most famous sight in Barcelona. The Sagrada Familia, Antoni Gaudí’s unfinished masterpiece, is one of Barcelona’s most popular tourist attractions. Construction on this church will continue at least until 2041, but it has already become Barcelona’s most important landmark. Designed by Antoni Gaudi, the Roman Catholic basilica is unfinished – despite the architect being commissioned for the job in 1883! Gaudi died in 1926 and work has continued on the building to this day. Officially, the magnificent building will be finished in 2026, one hundred years after Gaudi died. La Sagrada Familia’s façades look like someone through a museum full of sculptures at it. There are so many images to be seen on the basilica’s walls, you could spend hours walking around it and still find more interesting statues. You can climb the many, many stairs to the top of basilica, as well as look around the museum that details the history of the building’s construction.