Through the tropical-alpine Brenno Gorge
The Blenio Valley is where the "Sentiero Basso" is, a hiking path following the valley from Biasca to Olivone. It passes through Aquarosse, and touches some nearly virginal parts of the Ticino. Every once in a while one will find a hidden treasure, such as the Romanic belfries, the baroque churches and the medieval castle ruins.
The Blenio Valley is typical of the northern Ticino: densely forested cliffs towering over a sun-flecked ravine-like valley.