Always wonder about Monaco. That place looks like a PITA to navigate on a normal day, how they get all the support trucks and crap in there, plus set up for a race, seems like almost too much squeeze for the juice. At least Miami put it in a parking lot where huge crowds (well, Dolphins-sized crowds) are routine.
Even Austin, the track is a good ways from town, but a single little 2 lane road was the only access to it in 2012. They might have added more access since then, but that place is going to need a pretty involved re-surfacing or it won't be on the calendar much longer. It had severe porpoising before it was cool!