Mountain range of A Bobia Nature · Illano, Eo-Navia, Asturias Image of Illano, not of the place itself. The Sierra de A Bobia rises on the boundary between the concejos of Castropol and Villanueva de Oscos, although its slopes also extend into those of Boal, Illano and Vegadeo; on its Illano side, where it forms the concejo's highest peak, it reaches 1,162 metres, while its highest point, the Filso da Bobia, reaches 1,201 metres. The sierra separates the basins of the Eo and Navia rivers, and several watercourses rise within it, including the Porcía river, the Suarón river and the Urubio river. In Illano, whose relief is shaped around the confined course of the Navia river, its passes command views of the river's meanders and the neighbouring mountains, such as those of the Sierra de Riodecoba and Sierra de Estela. Photo: http://www.facc.info (CC BY-SA 4.0) What to see and do in Illano