What are some man made historical places in Australia?

Question: What are some man made historical places in Australia!?
Best Answer - Chosen by Asker:

Historic Sites in Australia

SW Australia:
http://www!.australiassouthwest!.com/en/Ar!.!.!.

Australia Travel guide, Historic Sites
http://www!.about-australia!.com/travel-gu!.!.!.Www@QuestionHome@Com

The Sydney Opera House!.
also, all the Olympic Venues they just installed!.Www@QuestionHome@Com