The Alpe della Luna (Alp of the Moon) is a mountain massif in the northern Apennine Mountains of central Italy. It is situated across the boundaries of Tuscany, Marche, Umbria. It is part of Appennino tosco-romagnolo. Its highest peaks are the Monte dei Frati, at 1,453 m above sea level, and Monte Maggiore (1,384 m). The sources of the Metauro, Marecchia (on the Adriatic Sea-facing slopes) and Tiber River tributaries (on the Tyrrhenian Sea side) are located in the massif area.