There's an interesting article about the Reims-Gueux GP Circuit here:
www.speedhunters.com
English version of the 'Friends of the Circuit' website is here:
Some great photo opportunities right alongside what is now a public road.

Temple Of Speed: Circuit de Reims-Gueux - Speedhunters
All famous roads, and I’m sure you’ll recognise at least one or two of them. But what if I said ‘D27’? I would be surprised if it meant anything to you, because it didn’t mean anything to me even before visiting this link road on the outskirts of Reims, France earlier this year. When Juan …
English version of the 'Friends of the Circuit' website is here:
Some great photo opportunities right alongside what is now a public road.