Odra (Pisuerga)

Humada is a municipality located in the province of Burgos, Castile and León, Spain. According to the 2004 census (INE), it has a population of 177 inhabitants. Of those inhabitants, a small minority are of French descent.

Valle de Valdelucio is a municipality located in the province of Burgos, Castile and León, Spain. According to the 2004 census (INE), the municipality has a population of 350 inhabitants.

Pomar de Valdivia is a municipality located in the province of Palencia, Castile and León, Spain. According to the 2004 census (INE), the municipality has a population of 531 inhabitants.

Berzosilla is a municipality located in the province of Palencia, Castile and León, Spain. According to the 2004 census (INE), the municipality has a population of 63 inhabitants.

Basconcillos del Tozo is a municipality and town located in the province of Burgos, Castile and León, Spain. According to the 2004 census (INE), the municipality has a population of 371 inhabitants. The municipality of Basconcillos del Tozo is made up of twelve towns: Basconcillos del Tozo (seat or capital), Arcellares, Barrio Panizares, Fuente úrbel, Hoyos del Tozo, La Piedra, La Rad, Prádanos del Tozo, San Mamés de Abar, Santa Cruz del Tozo, Talamillo del Tozo and Trasahedo.

Páramos, also known as "Sedano y Las Loras", is a comarca located northwest of the province of Burgos in the autonomous community of Castile and León. It is bounded on the north-east by the Merindades, north-west by Cantabria, west by the Province of Palencia, and in the south by the Alfoz de Burgos and Odra-Pisuerga comarcas.

The Camesa is a river located in the north of Spain, a tributary of the Pisuerga. It rises in the province of Palencia in the municipio of Brañosera. It runs briefly through the region of Cantabria, where gives its name to a Site of Community Importance. After passing through the village of Mataporquera, it leaves Cantabria, joining the river Pisuerga in the vicinity of Aguilar de Campoo, again in Palencia.

The Astronomical Observatory of Cantabria (OAC) is a center of the Ministry of the Environment of the Government of Cantabria, Spain, located in the municipality of Valderredible. The OAC is managed by the Environment Research Center (CIMA). Other entities that participate are the University of Cantabria, the Institute of Physics of Cantabria and the Astronomical Association of Cantabria.The observatory consists of a main telescope with a diameter of 40 cm, and several smaller telescopes that are dedicated to the popularization of astronomy.

Tariego de Cerrato is a municipality located in the province of Palencia, Castile and León, Spain. According to the 2004 census (INE), the municipality has a population of 547 inhabitants.

The Battle of Vellica was a battle of the Cantabrian Wars fought in the year 25 BC by the emperor Augustus and his Roman legions against the Cantabri forces who resided in the area. The most generally accepted location for the battle is the area around Monte Cildá, Olleros de Pisuerga, Palencia.

Villadiego is a Spanish town and municipality in the comarca of Odra-Pisuerga, in west of the province of Burgos, Castilla y León. It is seat of the comarca of Odra-Pisuerga. It is located 39 kilometres away from Burgos. According to demographic data of 2013, it has a population of 1,637 inhabitants, making it the second largest town in the west of the province. The town was founded by Count Diego Porcelos in the 9th century. It has large monuments around its most historical part of the town, of which a highlight is the Plaza Porticada and its traditional architecture.

Alar del Rey is a municipality located in the province of Palencia, Castile and León, Spain. According to the 2018 census (INE), the municipality has a population of 928 inhabitants.