Before you enter the Batlló family’s private residence, you will find a communal entrance hall on the ground floor. After viewing the sea and marine life motifs, as you enter the entrance hall, which is the first stop in the house, you will find yourself transported to an underwater environment. Here, you will find skylights that resemble turtle shells, vaulted walls with curved shapes, and a wooden staircase. The carved banister of the staircase is made from hardwood and looks like the backbone of an animal.