This place, with a rich natural biodiversity of flora and fauna, is formed by circular ponds of small size and some depth arising from the source of numerous ullals. Here we can observe riverside vegetation such as poplar, lime or willow, as well as typical flora of the marsh, and where different species of birds live, such as mallards and herons. The Ullals are freshwater springs that emerge from underground, a typical natural phenomenon of the Valencian coast and very vulnerable to human action. Within the ecosystems of the marshes, the Ullals are of great environmental importance as they have quality water throughout the year, even in years of severe drought. This lagoon area is equipped with wooden walkways and paths for visitors that link l'Ullal del L'Estany and L'Ullal de la Perla, two ponds supplied by groundwater from the karstic aquifer of the Mondúver Massif and water from irrigation ditches, ravines and rainfall. <span class="automatic-translation-warning">This text was automatically translated.</span>