Immersed in a nature reserve with a panoramic view of Lake Maggiore and the Lombard Prealps, the Sacred Mountain of the Holy Trinity of Ghiffa, the smallest of the Piedmontese Sacred Mountains, is an architectural gem built on an oratory where the miraculous "triple-faced effigy of Christ" was venerated.

Between the late 17th and mid-18th centuries, it was decided to create a Sacred Mountain around the oratory, representing episodes from the Old and New Testaments.

The complex includes three chapels dedicated to the Coronation, St. John the Baptist, and Abraham, as well as the sanctuary and the 18th-century portico of the Via Crucis.

The Sacred Mountain of Orta stands on a promontory overlooking Lake Orta. It distinguishes itself from other Sacred Mountains due to the close relationship between the surrounding nature and the buildings that compose it, carefully studied and organized since the original design of the complex to allow pilgrims to enjoy spectacular views of the lake along the path.

The history of the complex dates back to 1583 but materialized only in 1590 when the Orta community decided to establish a convent near the church of San Nicolao, a proto-Romanesque building that houses the ancient wooden group of the Madonna della Pietà dating back to the 14th century.

In 1591, the Capuchin Franciscans initiated the construction of twenty chapels dedicated to the life of St. Francis.

In the second half of the 17th century, on the hill of Mattarella, two Capuchin friars from the convent of Domodossola promoted the construction of a Sacred Mountain dedicated to the mysteries of the Rosary.

Its 15 chapels, twelve dedicated to the stations of the Via Crucis and three representing the Deposition of the Cross, the Sepulcher, and the Resurrection, are positioned along a path that starts from the city center and reaches the hill.

The Sacred Mountain of Domodossola has a close connection to the Passion of Christ, especially with the Calvary, so much so that at the top, at the end of the path, there is a Sanctuary with an octagonal base dedicated to the Holy Cross.

The Complex also includes the medieval Castle of Mattarella, the Convent of the Rosminian Fathers, and the Oratory of Our Lady of Grace.