Tiatordos Nature · Caso, Nalón, Asturias Tiatordos peak is a mountain of 1,951 metres located in eastern Asturias and part of Redes Natural Park, where it marks the boundary between the councils of Caso and Ponga. Its prominence, the distinctive silhouette of its summit and the beauty of its surroundings make it one of the park's most emblematic mountains. From Caso, the most common ascent route starts from the village of Pendones; from Ponga it is climbed via Taranes and Tanda. Photo: Teofrasto820 (CC BY-SA 4.0) What to see and do in Caso