That's the original Mandurah River mouth. showing some habitation around Old halls head.
Here is the latest Google image
What you don't see is that we have inherited the same designers as what made the gold coast, who seem to be in love with bloody big towers.
One concelation, as Mandurah is only about 2m above sea level a lot of these building plus all the anal development's will make an awesome reef as it has been projected that with about a 1m rise most of Mandurah will go.