Check Out Your Property Location Before You Arrive
The French Tax authorities make available online the French land registry plans (cadastre) for large areas of France; useful if you want to check out the extent of a property or a location before you visit.
The website allows you to view land and building plots, their surface area measurements, print the land map that you can see onscreen (although the viewing window is a little small), or you can order (by post) full-sized paper copies of the plans for a nominal fee per plan section.
Unlike the UK land registry site, at the moment there are no details available either as to personal ownership of each plot, nor the price paid by the present owner.
You can view the english site at French Cadastre