Reims-Gueux is the former Grand Prix road circuit west of Reims. Its old grandstands, pits, timing tower, and sponsor signs still line the roadside, some restored by volunteers and others fenced off for safety.
It is mainly an outdoor stop for motor-racing history fans, but the scale of the surviving buildings makes it interesting even if you only know the circuit by reputation. The site is best visited by car or bicycle from Reims.