My inner jury’s out on the aesthetics of windmills in landscapes. France is the place to see them, where they’re called Eoliennes, after Aeolus, the God of the Winds.
I suspect their impact depends more on the state of the sky than that of the land.
If the scene is a bit boring and not pretty, windmills are a definite enhancement.
Up closer, I love their size. Aptly, a friend commented that they recall Triffids -- but he may have meant those other tripod-like creatures in some other John Christopher novel.