abstract:The Magra is a long river of Northern Italy, which runs through Pontremoli, Filattiera, Villafranca in Lunigiana and Aulla in the province of Massa-Carrara (Tuscany); Santo Stefano di Magra, Vezzano Ligure, Arcola, Sarzana and Ameglia in the province of La Spezia (Liguria).