The site of Nakum may be divided into two main sectors, North and South, connected by a causeway named after Perigny. The Northern sector contains many impressive buildings, but it has been comparatively little investigated. The Southern sector is larger in extent, and contains the main Acropolis together with 11 patios and several classes of structures, including a 44-room "palace" (known as the D building). In the center of the southern complex is another elevated Acropolis which provides a clear overview of the other important structures. This latter Acropolis contains the building known as Structure Y, which by its location can be presumed to have served as the main residential complex for the site's main ruler.