I tried a similar treatment on my own entry, but as much as I liked it, I declined to enter that version do to some sharp haloing. I see a similar effect on yours. I'll post my outtake after the challenge. I would like so see if we were both doing the same thing.
Stonehenge is always an interesting subject to photo, but you've done something weird here, possibly over sharpening which has caused a halo around the stones and removed them from the rest of the image. That large white cloud formation also looks a bit odd against an otherwise very overcast sky.