I followed
@Lubliner's idea and looked at the trees. Assuming that they are native to the area (which isn't a hard indicator, as they appear to have been deliberately planted), the natural ranges of the species could be used to guess at possible locations.
I have no idea whatsoever about French trees, but I can guess at the 'Murrican ones.
Here goes:
The one on the left is some kind of maple --
perhaps a sugar maple, with those wide, hand-like leaves and scaly bark? If it is, then the deep South is pretty much ruled out (according to the mighty Wikipedia). But there are an awful lot of Maple species out there, and I could be wrong.
The one on the right... I don't know. I feel like I've seen this kind of tree, many many times, in the northern Midwest.
Lots of little leaflets and really fine-grained, gnarly/flaky bark. My knee-jerk reaction was either Ironwood (hop hornbeam) or some kind of Locust, but I don't know. American Ash? Black walnut? Or even an Elm (which I probably haven't seen, but which would not have been quite so rare when the photo was taken). Is it a pecan? It looked similar, based on photos of pecan trees, but there doesn't seem to be much overlap between native ranges of the sugar maple & pecan.
Help! Are there any arborists on this forum?