Po Delta is considered an UNESCO natural world heritage site because of its extraordinary cultural background that keeps nowadays its original characteristics.
Po Delta is a sediment deposit created in the mouth of Po River, in the Adriatic Sea. It covers more than a 400 km² surface and it is composed by 5 branches: Po di Maestra (or Maistra), Po della Pila, Po delle Tolle, Po di Gnocca and Po di Goro.
A delta is a fan shaped triangle created in multiple phases and Po Delta has changed its structure during the millennia. It is in constant growth and in the last century the delta area has continued to increase to the annual average of 70 meters. The scientists have calculated that in two thousand years Po Delta grew about 65 km. In prehistoric times the Po Delta’s expansion to the east was slower; the recent fast expansion is a consequence of deforestation in all its river basin.
The Po Delta area, always faced to floods and several projects of hydraulic preservation and reclamation works. It has an extraordinary abundance of natural environments and a great variety of animal and vegetable species. In order to preserve Po Delta, one of the largest humid zone in the Mediterranean area, it was established in the 1988 the Po Delta regional park, now included on the list of UNESCO natural world heritage sites.