I fluked upon what I reckon is a pretty amazing pick up on Google a little while ago. I was scanning the Northern Beaches of Sydney and saw a speck in what I thought was "in" the ocean and then zoomed in on it. I'm not sure if you can enter co-ordinates or not but the lat/lon numbers down the bottom left of the screen are 33degrees, 48'19.10"S and 151degrees21'04.92"E