The Tierra de Campiñas bird protection area in the Tierra de Medina Nature · Fuente el Sol, Tierra de Medina, Valladolid Image of Fuente el Sol, not of the place itself. The cereal fields of this end of the comarca fall within the special protection area for birds Tierra de Campiñas, declared in 2000, one of the great refuges of the great bustard on the peninsula. Photo: Fundación Joaquín Díaz (CC BY-SA 3.0) What to see and do in Fuente el Sol