One of the must-see attractions in Barcelona is the Casa Batllo. I chose to come here in the evening, just waiting for the night to light up. The Amartya House next to it is also very beautiful, just too late to visit. There are several floors in , this house with lines and colors, the lovely surface has a practical core. The staff at the top of the building will take pictures for you. It is also interesting to see the photos of tourists from different countries with different genders and different nationalities. This is managed independently by a foundation. The voice explanation is like a game. It is very exciting and the souvenirs are ingenious.