Castrojeriz or Castrogeriz is a locality and municipality located in the province of Burgos, in the autonomous community of Castilla y León, the comarca of Odra-Pisuerga, the judicial district of Burgos, head of the town council of the same name and former head of the Castrojeriz judicial district.
It is a popular stop along the French Way of the Camino de Santiago or The Way of Saint James, which crosses the city longitudinally for more than 1,500 meters.
Wikipedia https://en.wikipedia.org/wiki/Castrojeriz
Coordinates 42°17'18.131" N -4°8'26.305" E