 The rivers Saja and Besaya flow through the city.It is the capital of the comarca (county, but with no administrative role) of Valle del Besaya which includes also composed of the municipalities of Suances, Polanco, Cartes, Los Corrales de Buelna, Cieza, Arenas de Iguña, Bárcena de Pie de Concha, Molledo, Anievas and San Felices de Buelna.Its highest point is 606 metres and its lowest point is 12 metres.