The strategic importance of the place was already established in bygone days by the passage of the River Esla and the access to the regions of the Cea River, since both rivers flow together here.
The area played an important role during the period of Romanization and medieval resettlement, as the important archaeological and abandoned sites that have been found show.
- Fuentes de Ropel
- San Cristobal de Entreviñas
- Santa Colomba de las Carabias
- Cimanes de la Vega
- Matilla de Arzón.