/ Casa Milà, also know as La Pedrera, is another great building created by Catalan architect Antoni Gaudí at the beginning of the 20th century. You can visit inside to enjoy exhibits about his work, and visit the roof-top observation deck with its whimsical steps and towers, offering a nice view across the city. We listen to our informative guide, Sandra Benzal, who you can find through aguideinbarcelona. Sandra explains the exterior curved facade and marine sculptures remind us of the nearby Mediterranean Sea, and she points out this was the first building in Barcelona held up by columns, so the rooms could be very large and the walls were not load-bearing, giving Gaudí the chance to make curved walls and ceilings in his creative way. To see Casa Milà you walk a few blocks north of Plaza Catalunya along a stylish boulevard, Passeig de Gràcia, which makes a very pleasant stroll. Casa Milà and Casa Batlló are two of Barcelon's great sites you don't want to miss.