Back in 1900, Passeig de Gràcia was already the most important Avenue in Barcelona. This success was accompanied by the construction of the most fantastic and luxurious houses of that time. Since Casa Milà (La Pedrera) is one of the most important attractions in Barcelona and it has significant architectural importance and In 1984 it was declared Unesco Heritage, it was restored, and then in 1996 open to the public such as tourists in Barcelona.
Casa Batlló is located in the most important Avenue in Barcelona city back in 1860: Passeig de Gràcia. Since it is an important attraction, not only for tourists in Barcelona but architecturally, in 2005 it was declared Unesco Heritage and it receives more than 1 million visitors every year.