The Palacio de Donadío is located in Selaya, in the Plaza de la Colina, in front of the bowling alley, in the heart of the valleys of Pas.
It is a 16th-century construction made up of a central defensive tower dating from medieval times and a rectangular palace that surrounds it. Its portal, with a semicircular arch supported by two Tuscan-style columns, is intertwined with one of the five balconies that its façade has, and is finished off with a cut curved pediment and a shield with the arms of the house of Arce. between two lions
The palace is surrounded by a wall in which heraldic scrolls stand out and a magnificent doorway with a semicircular arch between pilasters, with pinnacles, balls and a helmeted shield, on which four lilys are carved and below a warrior carrying a sword in one hand and leaning against a tree with the other, on a bridge with four arches through which water flows. On his left are five severed Moorish heads.
Such an elaborate facade is remarkable in the Cantabrian architecture of the time and is the most remarkable of the municipality in terms of civil architecture.