No, the country was only inhabited by Aboriginies before the Europeans came and settled here over two hundred years ago. The Aboriginals were very tribal, and didn't build anything but ramshackle dwellings that could be easily dismantled due to their nomadic nature. The Europeans didn't build any grand monuments, just what they needed, and most of those building have been either torn down and replaced, or retrofitted and amalgamated into the towns and cities that surrounded them.