The name of this galacho is due to the fact that there were several ovens in the area to create charcoal in the vicinity. In 2006, The CHE began the work of cleaning and opening sheets of water, which was followed by repopulation, the creation of a trail and the construction of a viewpoint.
The most recent project made it possible to improve the comprehensive recovery of the wetland by opening several ponds. The new ponds are linked together by channels to facilitate the dispersal of aquatic fauna and create islets where birds can take refuge.
The Fornazos galacho belongs to the same river aquifer and is part of the set of Ebro water springs that formed the Larralde, Ojo del Cura, and Ojo del Fraile ponds. These lagoons are surviving remains of an ancient set of lagoons dispersed among the population centers of the province and that were buried, like the disappeared "rafts of Ebro Viejo". They are caused by the river aquifer that causes water to circulate through the land, emerging where the soil is below its water table. The ponds are formed by the subsidence of the land because the subsoil gypsum is dissolved by groundwater and ends up collapsing, forming chasms or sinkholes that when water surfaces are popularly called "Eyes."