The origin of the Carrascal wetlands in the municipality of Villalba de Duero (Burgos) is found in the old aggregate extractions: after having lowered the level of the land, it has caused the flooding of these gravel pits, the appearance of permanent wetlands and, with it, the habitability of a varied fauna and flora.

The reeds that grow on the shores of these wetlands are magnificent observatories for birds such as coots, ducks, sapper planes, imperial herons or the shy little bittern.

There are several wetlands that occupy this area, one of them being larger in size than the rest. Halfway between one and the other, you can stop and enjoy the scenery in the Fuente del Orbe recreational area.

Access is easy through the roads that occupy the area between Villaba de Duero and the right bank of the Duero River, 100% cyclable and can even be reached by car on an unpaved road.

There is no specific viewpoint for bird watching - birding.

These wetlands are part of the Humedales del Carrascal trail, a 10 km circular route, with a starting and ending point in Villalba de Duero, fully cyclable.

The land is part of the old gravel pits of the Gerardo de la Calle company in that town.