"Comarcas" in Cantabria have not reached administrative nature and barely have definite borders. Only Liébana for its geographic position in Picos de Europa, Trasmiera and Campoo, in the Ebro basin are established are clearly defined "comarcas" in the region. Nevertheless, functional differences in the territory can be distinguished, dividing it in the following areas: Santander Bay, of industrial and urban nature; Besaya, also industrial; Saja-Nansa, eminently rural; Western Coast, which has urban character; Eastern Coast, vacational; the traditionally renowned Trasmiera; rural Pas-Miera; Asón-Agüera, also mainly rural; the very well defined Liébana, and Campoo-Los Valles, rural and industrial by regions.