The Champs-Elysées is not a field but the name of a street in Paris. The entire fields in France are called by a different names. The Palace of Versailles and the Champs de Versailles are located there. There is a small vineyard in the photo, so it's not even Versailles. I doubt it's a big city, though, more like a local winery, many of which are in France. But not to guess, you can ask the post's author where it is in the photo. I could assume it's just a vacation in France where people share their photos but don't live there. We, too, have been on tour thanks to [simply-france.com] and posted photos. So I think the woman herself does not know where it is but writes that it is France with nothing French in the photo