The nature reserve "Fauler See" is located on the coastal fringe in the southwest of the island of Poel. From the picnic area, a magnificent view of the nature reserve extends after a long hike.
The 136 hectare nature reserve "Fauler See" is an important resting place for geese, ducks and swans. With the aim of protecting a grazed beach whale and hook system including a brackish water location on the southwestern Baltic Sea coast and preserving the very rich flora, it was declared a protected area on September 20, 1984.
The "Faule See" is a 0.5 m deep and approx. 46 hectare large brackish water lagoon with a muddy bottom. Horses and cattle graze on the surrounding salt marshes. Crayfish and mussels have also found their habitat there. Reed beds on the shores and on small islands provide breeding grounds for a variety of bird species. Views are possible from the paths of the villages Hinterwangern and Brandenhusen to the north. The long flight distances of many bird species require a year-round ban on entering the nature reserve.