We built the house that sits in the middle of the Yengo National Park. The entire structure is built from things that people have thrown away, including empty bottles. This image is of a wall that I built that measures approximately 3 1/2 metres wide by 3 metres tall. It is curved for strength and each bottle is 3/4 filled with water - to increase thermal mass. I sculpted around each bottle, predominantly with the theme of trees and plants for inspiration. In the morning we can tell the time by which bottles are illuminated by the sun.