These pools collect surface water from the entire area of the Italian pavilion and have been used to create wetlands with aquatic plants, characteristic of natural environments found in Italy. In addition to their naturalistic value, these species contribute to qualifying the landscape with glimpses of rare beauty so they have often been used in many historic Italian gardens for this reason as well.

The featured hygrophilous vegetation is therefore a reminder of the beauty and importance of wetland landscapes and ecosystems and the wealth of natural environments in Italy. Rivers and bodies of water can play host to high biodiversity. The vegetation that grows along the banks and in wetlands is structured in complex formations, giving rise to real mosaics of ecosystems. Thanks to its geomorphological characteristics, Italy is rich in natural environments of this kind, and these water basins are a small example of how the "natural aspect" can also become a tool for beautifying our cities.

The vegetation in the water basins is herbaceous and consists of some of the most common species in Italy: Butomus umbellatus, Caltha palustris, Iris pseudacorus, Juncus effusus, Lythrum salicaria, Mentha aquatica, Ranunculus lingua, Sagittaria sagittifolia, Typha minima.