Monastery of Santa María la Real de Vileña Monument · Villarcayo de Merindad de Castilla la Vieja, Las Merindades, Burgos A women's monastery that preserves Gothic tombs and a notable ensemble of religious images and altarpieces, in one of the twenty-six local entities that make up the head municipality of the Merindades. Photo: Maragm (CC BY-SA 3.0) What to see and do in Villarcayo de Merindad de Castilla la Vieja