Alpe di Cadinello is a high mountain pass at an elevation of 1.828m (5,997ft) above the sea level, located in the canton of Ticino in Switzerland.
Starting from Roveredo this winding road is totally asphalted, but extremely narrow (totally impassable for 2 cars at the same time), and pretty steep, with sections up to 20%. In many places the road is bordered by a drop of hundreds of meters (many hundreds of feet) unprotected by guardrails. There are some scary parts, especially because its narrowness and drops off.
The final part of the climb includes a narrow tunnel called Galleria di Cadolcia. It’s a 250m unlit gravel tunnel that was built during the 2nd World War (finished 1941). The view over Bellinzona and as far as Lake Maggiore is superb. After the pass the road continues but on a gravel surface in very poor conditions.