A little too much sky I think (if you want the effect of a lot of sky I think yo need to go all the way and do it in portrait orientation). Nice color on the stones.
Good idea, great subject ! This has been part of the landscape for how long ?
Too bad your image is suffering from compression artefacts. You should try to stick to the 150k limit as close as possible. There's a tutorial in the Learn section.
I like your creativity! Also, having a lot of sky adds a nice touch to it. I think it would be better with slightly less sky, though (maybe 2/3 sky and 1/3 Stonehenge?). Just a thought. Nicely done!