I voted next to the pond. I think the spot along the ocean would be lovely, too. The only reason I didn't pick it was because I thought a lighthouse might look better there as opposed to the well.
I believe both pond and waterfall would work. Pond would look a little more cozy imo, but it may fit better down by the waterfall, I'm not sure!
I’m one of the only people who voted for river bend, lol!
I always place PWPs while thinking of aesthetics and my town’s story (imagining villagers strolling out to the edge of the waterfall to collect their water in your town. Or, for my town, maybe my buddy Erik likes to enjoy the camping area behind his house on the weekends, etc).
So, the waterfall and bridge location works the best from your town’s map (for me personally).