On Wednesday June 11 the Water Park opened, work of aldayjover arquitectos (Iñaki Alday and Margarita Jover) with the French landscape Christine Dalnoky, held next to the EXPO 2008 in Zaragoza.

It is a park of 125 hectares (1,250,000 m2) which organizes the Ranillas Meander, which houses the Exhibition site, with a total investment of 83 million euros. Includes a building for management and visits the park and several pavilions of public initiative to support its activities (Ceremonies, Bath & Quay).
Apart from its size and uniqueness of the site, ordering the transition between the consolidated city and the Expo to the countryside on the banks of the Ebro, the Water Park is characterized by:
- Its relationship with the river and the flood: an important part of the meander is returned to the river and riparian forest, bringing about their natural flooding
- Its water system structures the Park: captures water from the river Ebro, the ditch of Rabal and subsoil, improving its quality through natural systems in a green filter and a wetland educational aqueduct built to provide quality bathroom, is used in a public bath in canals and ponds and waterways and, ultimately, is recycled for irrigation and to maintain wetlands of high ecological value.
- The use of native vegetation compatible with the richness of three open and public botanical gardens, devoted to the vegetation of the Ebro, the vegetation of the Food and Exotic vegetation, with the most varied collection of existing palm trees in a public park, in addition collections of bamboo, ferns and lilies.
There are also singular pieces of the park the Deposit Canal, 400 m long and 25 m wide, its aqueduct water treatment, 270 m in length, with different vegetation compartments also on walks and pond natural baths in the restroom is performed in water treated naturally between vegetation zones and areas of greater depth.
The authors of the Project are aldayjover arquitectos (Iñaki Alday and Margarita Jover) that have been awarded in the past with the European Prize for Urban Public Space (2002) with the French landscape archityect Dalnoky Christine, who has previously received awards including the Silver Medal Academy of Architecture in Paris (2000) or the European Biennial of Landscape (2001)
Excerpts that explain the main ideas of the Park are transcribed:
A registered park in the hallway of the Ebro, in the traces of its history, at a bend in a river full of energy and owner of its own dynamics.
The imagined history to invent the park is to project ourselves on the silver forest of origin, to expand and settle there, cutting clearings, installing grassland, organizing the layout of the water as the farmers did. Our ambition is not to establish a brutal picture on the site but allow the soil to express its qualities: unlike architecture, the landscape is not drawn; it expresses the story of a territory and the relationship its inhabitants maintain with it, and reflects the strength of the river and the flood. The park is a place for overflow and natural filtering through the vegetation, where the river can dissipate energy and traced back downstream. The most treated areas and auxiliary park buildings shall be immune from these floods, while the riparian woods will be covered by the blade of the Ebro