The Marian Way continues towards the Serravalle narrows , crossing an area that is now almost uninhabited, but marked by the tragic landslide of July 28, 1987: 30 million cubic meters of rock broke away from Mount Coppetto, causing 28 casualties, destroying Sant'Antonio Morignone and raising the valley floor by 50-70 meters. The landslide buried theCarolingian church of San Martino, sparing instead that of San Bartolomeo de Castelàz, which became a symbol of hope.
The path flanks the weirs built after the landslide to contain the material that blocked the Adda River, forming a temporary lake. At the Serravalle narrows, once an obligatory passage protected by a wall, the landslide also obliterated the Devil's Bridge.
Past the area, one crosses a wild and fascinating landscape. At Grailé stands the church of Madonna della Biorca, with two walled aedicules and linked to historic processions, such as the one in 1739 for the cattle plague.
From Mondadizza you reach Sondalo, passing through the Boffalora hump, inhabited as early as the Iron Age. Here is the hermitageof Sant'Agnese, from which comes the "Romit," the oldest wooden crucifix in the province, now in the church of San Francesco.
The parish church of Santa Maria Maggiore, already present in 1025, was rebuilt in the 17th century by Gaspare Aprile. Particular is the "Clothed Madonna," of which the wooden mannequin remains.
Descending to Tiolo, visit the Church of the Visitation, which in the Middle Ages served travelers on their way to the Mortirolo Pass. The scenic prothyrum, the high altar by Pietro Ramus and the anatomical wax votive offerings stand out.
Crossing the Adda, one arrives at Grosio, rich in history. The church of San Giorgio has wooden trusses, frescoes and a Marian chapel frescoed in 1498. Nearby, the Villa Visconti Venosta houses a museum and library, and the parish church of San Giuseppe is an example of 17th-century sacred architecture. The Dosso dei castelli, frequented since prehistoric times, holds Rupe Magna, the most engraved rock in Europe.
It ends at the sanctuary of the Beata Vergine delle Grazie in Grosotto, built between 1609 and 1664. A statue of the Madonna and Child by Giacomo Del Maino survives. The wooden altarpiece by Pietro Ramus (over 10 meters high) and wooden furnishings enrich the interior. The walk continues toward the countryside, leaving behind an old town center that is still worth a visit, especially for the parish church of St. Eusebius.
