"Telegraph Forest"; an art work by Phoebe Pape which was constructed in Bicentennial Park for the 2000 Sydney Olympics. It lives alongside the Archery Centre. Although it's built on what was once a dump / landfill, it's now a fairly expensive place to live.

Addendum: My personal opinion is that Facebook is a sociopathic organisation that steals other peoples' intellectual property (including the images in this gallery) despite being explicitly denied permission to do so. Facebook going out of business would IMO be a net gain for humanity.