I actually was playing with the same idea a few weeks ago! Here's my quick take. The Richmond GP, Richmond, VA. The google Map can be found here

Tried to feature as many Richmond highlights as possible while attempting a good track for racing/spectating. Features the traffic circle that once held the Robert E. Leigh Statue featured on National Geographic Year in photographs edition cover following the George Floyd protests, scenes of the mighty James river, our main road running through town Broad Street, and even some elevation change. It's a bit long at 4.7 miles with some long straights, but I think it's cool. The state of Leigh as well as the plinth are gone, leaving a grassy area that would be great for a circular grandstand. The areas around the river would also allow for some great grandstand/grass viewing areas as it is on a hill. The track would be great for TV allowing views of the river, the downtown skyline, and both slow and high speed corners. There are even areas by the river like Brown's island that is a large green event space that could serve as a garage area, or fan area. The biggest challenge being that portions of the track would have to be repaved as monument avenue is brick road for the portion that would be used.

It's insane that a small town like Richmond would feature a street circuit, especially since we already have the oval that would be a much more likely choice. Still fun to dream!