The Sibillini cross the boundary between Marche and Umbria. This guide concentrates on the Marche side: lake country, Visso and Ussita, Macereto, Montemonaco and the approaches to Vettore. Distances around the massif matter. A village visit, an official nature trail and a high mountain route are separate undertakings. Reconstruction after the earthquakes is a present human reality, and an older image never establishes current access.
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.
High basins, a reservoir, pilgrimage architecture and communities rebuilding their towns reveal a mountain landscape with many scales of time.