I recently visited Western Australia and took a trip to the Pinnacles Desert, which is about a 3 hour drive north of Perth in the Nambung National Park. The area gets its name from limestone formations that are clusters of seashells that were broken down into lime-rich sands that were blown inland from the nearby Indian Ocean to form high mobile dunes.
Arriving at sunrise, the pinnacles exploded into a forest of gold as the sun crested the horizon. A truly amazing sight. I worked all day in the desert, not leaving until sunset. I have created a folio of my images from this trip at: http://aransomephoto.com/gallery/pinnacles-desert-western-australia/