Barcelona is not only the city of Gaudi, but also the city of real architecture. With the three buildings of Ghost Cai Gaudi as the first, the style is different and magnificent, and it has become a popular attraction for must-check in; The monumental architecture of Barcelona, which is famous for its architecture, is also selected as a world heritage site; there are many ancient Roman and medieval relics in the city, and many modernist masterpieces are also integrated.