@contrex,
I don't know where I had the idea Darwin was on the West Coast. The only reason I can give is that in my aging senior years, my memory has gotten very bad.
On the East Coast, I've been to Port Douglas (Iron Bar), The Great Barrier Reef, down to Melbourne. Really enjoyed Sydney with their Chinatown, Gastown, bridge climb, tour of the Opera House, Olympic site, and cruise to Bondi Beach.