Windmills were considered eyesores in 17th century Holland. Now we believe they are beautiful. And so they are. But there is a prejudice to presume that industrial things are not beautiful. We learned to see the beauty in windmills after artists painted them.
Alain de Botton discusses the beauty of windmills and power lines in his interview on EconTalk.
Many of the industrial things in the world are considered ugly, not because they are ugly, but because nobody has come along to point out that they might be beautiful. … A lot of times we call things beautiful or ugly because artists have been there and shaped our sensibilities. … and in a small way, that’s what my book is about: finding beauty where genuinely there is beauty but it gets missed.