that said "WW2 fuel storage", I followed the signs and I found a large complex with several fuel tanks that were constructed in the beginning of 1941. After that I continued my journey to Darwin; in Darwin there are still quit a few places related to the war, such as airstrips, oil storage tunnels and coastal batteries.
My last stop was Sydney and its surrounding cities, I visited some nice coastal batteries, and some of them are original form the 18th century but they are all used in the defence of Sydney during WW2.
So after 5 months of travelling I visited lots of interesting places and it was nice to see that several batteries were quit similar with the early batteries in Europe, although there were of course some differences in style and material. But after all it was an incredible journey and having seen bunkers in Europe, Asia and Oceania is quit special!