The Presidential Estate of Castelporziano stretches itself over an area of about 6100 ha and is located approximately 24 km from the city of Rome. The territory is characterized by remarkable natural features. It shows most of the typical Mediterranean ecosystems (relict strips of lowland forest with hygrophilous vegetation, deciduous and evergreen mixed oak woods, pine forests of stone pine, Mediterranean scrub, dune vegetation). Inside the Estate, there are two SCI (Sites of Community Interest): one concerning the coastal strip (IT6030027) and the other one concerning hygrophulous oak-woods (IT6030028). From a botanical point of view this area, together with the neighbouring Castelfusano territory, represents what remains of the vast forest system that covered the entire delta of the Tiber and the surrounding areas. The land is mostly flat, but in the North there are modest reliefs that are not higher than 85 m. on sea level. A complex set of ancient dunes and a chain of more recent dunes stretch out along the coastline. There are many temporary and permanent natural pools and wetland areas with seasonal floodings caused by meteoric water and groundwater, which usually dry out during summer and represent sites with the greatest biodiversity. From an ecological point of view, those “relict wetland areas” play actually a very important role for biodiversity because of plant species which are typical of hydrosoil and in the past were widespread but have now almost disappeared.