The Ontanilla Pond is one of the wetlands associated with the Canal de Castilla, one of the great hydraulic engineering works developed between the 18th and 19th centuries. Its origin is directly linked to the excavation and continuous operation of the canal, which favored the appearance of waterlogged areas due to seepage and runoff along its banks.
From a physical standpoint, it is a seasonally flooded basin without any monumental structures, naturally integrated into the agricultural landscape of Tierra de Campos. The presence of water, clay soils, and marsh vegetation creates a space of great contrast with the surrounding cereal crops, reinforcing the scenic value of the entire Canal de Castilla area.
The pond is part of the protected wetland system of the canal and is included within the Special Protection Area for Birds (SPA Canal de Castilla).
For the visitor, the Ontanilla Pond offers a peaceful and complementary experience to the canal tour, allowing them to discover how an infrastructure designed for transport and irrigation gave rise, over time, to valuable ecosystems now recognized as an essential part of the territory’s natural and cultural heritage.
