The pilgrimages of la Peregrina and San Marcos Activity · Muelas de los Caballeros, La Carballeda, Zamora Image of Muelas de los Caballeros, not of the place itself. Donado hosts two pilgrimage festivals of comarca-wide renown, that of San Marcos and that of the Peregrina; in Muelas the patronal festivities fall on 15 August, for the Assumption, and on the second Sunday of September, for the Cristo. Photo: Antramir (CC BY-SA 3.0) What to see and do in Muelas de los Caballeros