At the beginning of 2009, the garden acquired a very large water tank (22,000 litres) and connected it to nearby roofs. Karen O' Connor, RCOG artist in residence, designed a mural and organised a group of RCOG members to paint the mural on the very high walls of the tank, including its roof ! The tank has now become a landmark, with its bright earthy colours, that can be seen from Botany Street.