This artwork sits on the shore of Wolloomooloo Bay, near the Andrew Boy Charlton Pool. Dual Nature, created by Nigel Helyer in 1999, is described as a soundscape installation. It relates to the history of people and shipping in Woolloomooloo Bay with hybrids of marine, industrial and natural forms, transmitting ambient sounds. The semi-submerged shell objects act as natural reverberation chambers endlessly changing tone as the tide gradually fills and empties their interiors. The shell forms resting on the old sandstone structure, which was once the platform for the 'Figtree Baths', feature recordings digitally stored in chips with audio systems powered by solar panels located on top of the cranes.