- Climb to the top of the Sydney Harbour Bridge ...www.bridgeclimb.com.au
- Technology in Australia 1788-1988, Chapter 6, page 426, Bicentenary study by distinguished Fellows of the Australian Academy of Technological Sciences and Engineering of development of technology over two hundred years.www.austehc.unimelb.edu.au/tia/426.html
- See the spectacular views of Sydney ...www.pylonlookout.com.au
- www.sydney.visitorsbureau.com.au/page2-03g.html
