Update: Thanks to cowens and others who informed us that this is actually an absolutely massive piece of land art called desert breath. Click through for some images and a way better description than I gave it!

What on earth is the purpose of this massive spiral in the Egyptian desert?

It appears to be made from near-perfect circles scooped from the sand, which decrease in size toward the centre of the spiral - where there is a much larger circular trench.

Whatever the spiral’s purpose actually is, it must have taken a serious amount of effort to put here.

Thanks to BZoltan