Lake Stymphalia is one of the most significant wetlands of Greece in the municipality of Sikyonion. The land is closely related to one of the most popular mythology heroes. Hercule’s sixth feat consisted of killing the Stymphalian birds, the man eating birds with bronze beaks which haunted the lake, with his arrows. According to scientists, the Stymphalian birds were inspired from the Northern Bald Ibis (Geronticus eremita).
It is situated at an altitude of 600 meters on the plateau bearing the same name. It receives the water of the plateau’s springs and the water drained from the plateau of the reclaimed Pellene Lake.
It is designated as a landmark for fauna and flora under the EU’s Natura 2000 program.