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The Vione tower was part of the fortification system in the area between Mazzo and Grosio, built by the Venosta family in the Middle Ages. Like practically all the other castles in the valley, it was destroyed shortly after the Grisons from Switzerland conquered Valtellina in 1512. The tower had a lookout function and in fact offers a beautiful view.

Visits to the wall with the rock carvings must be booked.

Beautiful Valtellina castle, just above the deck, cannot be visited inside, private

Very beautiful section of the Castelli path, with very steep and sometimes technical climbs (you may have to push the bike). There are points near the Bellaguarda Castle where there are steps and narrow hairpin bends where if you are not expert it is better to carry the bike on your shoulder.

Pedenale castle is part of the Sentiero dei Castelli. You can get there via steep paths in the woods, which are pleasant but at times you may have to push your bike.

The Vione tower is part of the Sentiero dei Castelli, and is located in a sunny spot on the Rhaetian side above Vione. You get there via a steep path where you might have to push your bike or carry it on your shoulder, but there is a beautiful view and it's a nice spot to have a picnic.

The Visconti castle and the nearby Rupe Magna are an attraction worth visiting if you pass through Grosio. You can get there easily from a path that passes through the gorge just to the north and there are several benches for stopping and enjoying the view. Guided tours are available on certain days and times for both the castle and Rupe Magna (a gigantic rock full of prehistoric rock carvings). They are also the halfway point of the Sentiero dei Castelli.

The rock carvings park is an area worth visiting to discover the prehistoric and medieval past of Valtellina (guided tours are available) but also just a panoramic point where you can stop (there are several benches and areas equipped for picnics). You can see the Rupe Magna, the new and old castles (Visconteo and San Faustino respectively). It is also a crossing point for several paths, including the Castelli path.