The Sentina Regional Natural Reserve has been instituted on December 14th, 2004, and it is the smallest and one of the youngest protected areas in the Marche Region.
A landscape of water and sand that stretches for about 180 hectares within the City of San Benedetto del Tronto, between the district of Porto d'Ascoli on the north and the Tronto river on the south.
For a stretch of about 1.7 km, the area on the immediate north of the mouth of the Tronto river is formed by a sand dune behind which there are small patches of brackish wetlands and salty meadows, that by now have become rare ecosystems along the Adriatic coast.
The flora of this biotope still has characteristics of extraordinary biogeographical relevance in the Marche Region, and more generally in the central-southern Adriatic Italian sector. In addition to the vegetation (the site was declared by the Marche Region "Floristic Protected Area"), the area is particularly significant for the migratory birds, since it represents one of the few stopping points for migratory birds between Gargano and the Po river wetlands, for this reason it has been recognized as a Special Protection Area and Site of Community Importance - http://www.life-rescwe.it