Olbia is both an arrival point and a city with its own long history. From there, the northeast opens into the archaeological landscape of Arzachena, the granite streets of Tempio and Aggius, and the headlands facing the archipelago. La Maddalena and Caprera add maritime, military and personal histories. These places belong to different kinds of outings: allow substantial time for museums and inland towns, and treat island transport and protected-area access as separate arrangements.
The guide separates documented history from suggestions for reading the site. Named buildings and landscape relationships follow institutional sources; the illustrations are editorial interpretations, not measured surveys or records of current access.
Granite towns, Nuragic architecture and island histories give the northeast a depth that extends beyond its beaches.