Mine falls park: Nothing too exciting except for a random C. americanus major foraging (in the middle of the day, weird)
I was there last week with my kids and noticed the same.
I've also been seeing a lot of C. americanus during the day here which is interesting. Not just 1 or 2, but usually a group of 5 or 6. Also have been seeing C. pennsylvanicus moving in clusters for 20-30 in very close proximity. I tried to get a picture of it but didn't do any justice. Looks like a blob of carpenter ants moving together along the driveway.