Marabio Pass Nature · Yernes y Tameza, Oviedo, Asturias The Marabio pass is a broad mountain pass with large meadows and a hydrogeological network of great value, with dolines and blind valleys, extending between the concejos of Yernes y Tameza, Teverga and Proaza. Its 1,225 hectares were declared a natural monument by Decree 41/2002, of 19 April, and the area is also included in the Las Ubiñas-La Mesa nature park and in the Caldoveiro and Ubiña-La Mesa special areas of conservation. The Enlightenment figure Gaspar Melchor de Jovellanos, who climbed up to it from Entrago, recorded in his Diario, in 1792, its great karst craters, the huts for livestock and the shared facería pastures used by the people of Yernes y Tameza. Photo: jacilluch (CC BY-SA 2.0) What to see and do in Yernes y Tameza