The Valleys of the Pas and Miera Rivers comprise an administrative comarca in Cantabria, Spain. It is formed by the valleys of said rivers, each one being a natural comarca of its own.The Pas-Pisueña valley is located in the autonomous community of Cantabria, and through it flow the Pas River and its main tributary, the Pisueña River, which joins the Pas in the township of Vargas, part of the municipality of Puente Viesgo.During the 16th and 17th centuries large convents or monasteries were founded, as El Soto and the Franciscan monastery of La Canal, as well as Baroque churches, built by artisans and artists of the comarca. In those centuries, emigration to the "Indies" was also very popular. The Indianos (Enriched Spaniards returned from the Americas), at their return, built churches or contributed to the building of chapels, towers, or the acquisition of works of art for the Church. The best examples are in the Obra Pía chapel of Bárcena de Carriedo, founded by the Indiano Manuel Rodríguez, or the reconstruction of the San Miguel de Llerana church, which also added the sacristy and the greater altarpiece to the existing church. In the tower of the same church a museum has been fit out about the Indianos of Carriedo Valley.