I've lost count of the number of times punters ask, "yes, but how on earth did they get the stone up there?"
Well, if you consider that the builders were reflecting the natural feature of the mountain, then presumably they'd pile earth up in a mound over the standing stones, then draft in a few mates from the valleys to drag the lintel up the mound. I'm sure a kiddy in a sandpit can work this out, rather than ascribing magical or arcane flying-saucery(arf)to its builders.
I did a bit of contrast-masking to help with burning in the sky.