Livigno is a town in Valtellina. The town winds along the road that runs for over 15 km through the entire valley crossed by the Spöl stream (formerly called Aqua Granda) which conveys its waters towards the Eno (Inn) and from there to the Danube.
Livigno is therefore one of the Italian municipalities not belonging to Italian river basins. Due to this peculiar situation in the national territory of a tributary to the Danube basin, Italy, according to the Belgrade Convention of 1948, has the right to participate in international conferences on navigation of the Danube and Italian vessels do not pay navigation up to and including the Black Sea. The Spöl flows for half of its initial stretch in the Val di Livigno and for the other half it flows in the Engadine, Switzerland. The dangerous passage of the Spöl in a very narrow, steep and craggy valley between the two parts, the upper and lower courses, has historically been a very difficult valley access to Livigno, explains the relative isolation that the Val di Livigno has suffered in the past. The other two accesses are high altitude mountain passes.
At the following link you can read an interesting article "On the paths of memory: the White War at the Stelvio Pass" written by the scientific journalist Giuditta Bricchi.