Castle Rock is just outside Dunsborough. The carpark is the site of an old whaling station that dates back to the 1840s. I have heard rumors that part of the old station is buried beneath the car park!
This shot was difficult to get. There was a band of cloud on the horizon when I arrived, and it looked like the sunrise was not going to happen. I tried various positions and nothing was working until I saw that this cloud and rainstorm had moved to a position where I could line up the rock and the cloud. As I got in position the sun rose above the line of cloud on the horizon and the early rays lit the back of this cloud.
This is a four image stitch of blended exposures. This technique does not work well with waves (or other moving objects such as trees in wind), so I selected the best of the individual exposures and masked the water back in from a single image.