From the Wikipedia page 
Vorpommern-Greifswald (German: Landkreis Vorpommern-Greifswald, Polish: Powiat Vorpommern-Greifswald) is a district in the east of Mecklenburg-Vorpommern, Germany. It is bounded by (from the west and clockwise) the districts of Mecklenburgische Seenplatte and Vorpommern-Rügen, the Baltic Sea, Poland (West Pomeranian Voivodeship) and the state of Brandenburg. The district seat is Greifswald. A lake called Berliner See is found in the district.