South Watuppa Pond was probably once ringed with the campsites, stone rows, effigies and manitous of the Pocasset Wampanoags. Most of the original shore has been lost to waves of development for farming, industry, and residential use. However, the raising of the pond level in 1826 saved some sites from destruction, while partially or completely hiding them. The few sites that remain raise many questions.
The two turtle boulders and the manitous described in these posts all face north instead of southwest. This may be simply because the structures follow the long axis of the pond. Another possibility is that these structures face something important to the north. Here are two possibilities.
Also to the north is the rocky peninsula at the Quequechan River inlet, just off Brayton Avenue Extension.
Although this bit of land is now topped with a power line tower, there is still a huge boulder resting on smaller rocks, and a commanding view of South Watuppa Pond.
So was this site used as an observatory, or is it all coincidence? I have seen enough alignments in northern RI to convince me that these reflect a desire to organize the landscape in respect to nature. Unfortunately, it is difficult to prove that these sites were used as observatories, especially when they are disrupted by development.