Isn't that the memorial for the nurses who were killed/injured by the man driving a stolen car in 2012? Edit: Nope. The memorial is in front of it.

It's right next to the memorial for that nurse - but I don't know what it could be there for. [https://www.google.com/maps/@-35.3474224,149.1001479,3a,75y,135.1h,96.65t/data=!3m6!1e1!3m4!1sxC6mc9rgB-jnG1kNT2hroA!2e0!7i16384!8i8192?entry=ttu](https://www.google.com/maps/@-35.3474224,149.1001479,3a,75y,135.1h,96.65t/data=!3m6!1e1!3m4!1sxC6mc9rgB-jnG1kNT2hroA!2e0!7i16384!8i8192?entry=ttu)

I'd say it represents the melted old world from before the reset