This wetland, linked to the Canal de Castilla, is a clear example of how a large, historic hydraulic infrastructure has indirectly generated natural spaces of enormous interest. It is not a structure built with a specific documented chronology, but rather a wetland environment created by the diversion and impoundment of small natural runoff streams and, above all, by leaks and seepage from the canal itself. The flat, gently sloping terrain of Tierra de Campos provides ideal conditions for the formation of pools of varying sizes.
The primary function of this wetland is ecological: to collect water that escapes from its intended use and transform it into marshy areas, now scarce and essential for wildlife in arid regions. Its generally shallow morphology favors colonization by rushes and reedbeds, which cover much of the surface and structure the landscape. The dominant marsh vegetation creates refuges and breeding grounds for numerous animal species, especially birds associated with these environments, making the pond a true reservoir of biodiversity.
The state of conservation is, in general terms, good, although highly dependent on the water supply and agricultural practices of the surrounding area. Its heritage value lies precisely in this relationship between historical engineering and nature, which has resulted in a unique and functional landscape.
For the visitor, this wetland offers a complementary experience to the Canal de Castilla tour: a quiet space for bird watching and landscape interpretation, where one understands how the canal not only transformed the economy and the territory, but also fostered the creation of valuable natural environments in the middle of the cereal steppe.
