I have a terraformed area around the Resident Services plaza where I made a waterfall around the two sides and back of the plaza, there's no more water around the waterfall though - it just goes from the top and essentially disappears into the ground below - yet my villagers always fish there, either from the plaza fishing into nothing or even odder they'll sometimes stand atop the terraformed area and just fish down into the waterfall.
Also they have a habit of walking away when taking photos, sometimes I'll see a couple of them sat together and will try and take a picture with them but they leave while I'm trying to get the right angle.
Also they have a habit of walking away when taking photos, sometimes I'll see a couple of them sat together and will try and take a picture with them but they leave while I'm trying to get the right angle.