I looked at the caption and immediately a song popped into my head: then I realised - Nana Mouskouri singing "Star of Mykonos". (I think that's how her name's spelled??? )
Apparently these mills aren't used anymore for their original purposes, but are now used as museums, storage, and housing. I wonder how well they would have caught the wind - or, is it because the wind is strong enough, there doesn't need to be much of a surface for the wind to catch to start the windmill moving.