MONA Museum of Ancient and Modern Art was built by David Walsh at a cost of 75 million Australian dollars. The walls and the top of the museum are all bare stone walls. Inside MONA, there are three layers of exhibition hall extending downward. During the entry period, it is dark. Only the wall lights shine in front of the exhibits, coupled with the avant-garde modern exhibits, which leave a mysterious feeling. MONA is characterized by O-shaped distribution. Bit. fall is my favorite work of art, converting words into water droplets.