Pilgrimage of la Virgen de Otero Activity · Congosto de Valdavia, Vega-Valdavia, Palencia Image of Congosto de Valdavia, not of the place itself. On the last Saturday of May the residents go up to the hermitage of the Virgen de Otero in a pilgrimage festival that opens the valley's festive calendar, before the great festivals of 15 and 16 August. Photo: Valdavia (CC BY-SA 3.0) What to see and do in Congosto de Valdavia