As reported elsewhere (see Liller, 1993 for the most recent summary and for other references), there now exists overwhelming statistical evidence that on Rapa Nui, as many a 15 or 20 ahu were constructed with their orientations or location -or both-carefully predetermined with an astronomical intent in the minds of the designers. One of the most outstanding examples is Ahu Huri A Urenga, the modest single-moai ahu on the outskirts of Hanga Roa close to the road from the airport to Anakena. (This moai is perhaps best known for having four hands.)
"Astronomical Alignments and Pointing Devices in Ancient Polynesia,"
Rapa Nui Journal: Journal of the Easter Island Foundation: Vol. 11
, Article 3.
Available at: https://kahualike.manoa.hawaii.edu/rnj/vol11/iss1/3