Lake Kaiafa is a small freshwater lake in the region of Elis in Western Greece. Located north of the city of Zacharo. The lake stretches for about 4 km from northwest to southeast (parallel to the sea coast, separated from the lake by a 400-meter sandy strip overgrown with Aleppo pine). Along the southwestern shore of the lake stretches a narrow artificial peninsula 1.3 km long with buildings of the tourist sector.

Some tourist websites claim that the lake was formed in the 6th century AD. e. earthquake, but this has not been proven. One way or another, Pausanias and Strabo, describing the area, do not mention the lake, which suggests that the lake appeared later than the 2nd century AD. e. Previously, it was a lagoon of the Ionian Sea.

Currently, there is some tourist activity on the lake: rowing, thermal springs.