I head out early to stroll down the city’s seafront and enjoy the sunrise again. To understand Barcelona’s urban planning a little better, we can go on a private tour with an architect through the Eixample, the urban expansion that connected the old town with the Vila de Gracia, forming a checked pattern that looks as though it were drawn with a ruler. The neighbourhood is home to a large proportion of the city’s heritage-listed buildings, including important modernist works such as the Casa de les Punxes, La Pedrera, the Casa Amatller and the Casa Batlló.