The Unai Achugao Archaeological Site is a major archaeological site on the island of Saipan in the Northern Mariana Islands.
This site is one of the first sites at which reliable radiocarbon dates were acquired for the early habitation of the island, which were dated to about 3500 BCE.
The site also included a nearly-intact habitation surface which was protected by a fossilized coral reef.
[2] The site was listed on the National Register of Historic Places in 1996.
This article about a property in the Northern Mariana Islands on the National Register of Historic Places is a stub.