Sure look it, there have been a whole heap of these lately and we're 99.9999% sure that it's a rock formation. 

But the guys over at UFO Sightings are pretty sure it's something else. And they don't just love this shit, they live for this shit. 

Have a butchers below and see what you think. We're not sure what an alien drone looks like exactly, but we're not scientists (ha) soooooo wouldn't know one even if we did see one.