Lake Afdera (also transliterated as Lake Afdera) is a hypersaline lake in northern Ethiopia. Located in Administrative Zone 2 of the Afar Region, it is one of the lakes of the Danakil Depression. According to its entry in Lakenet, it has a surface area of 100 km2 (39 sq mi), although another source states the area is 12,500 hectares. An unconfirmed report gives its depth as 160 m (525 ft); the lake is fed by underground streams.
It is also known as Lake Giulietti, the name Raimondo Franchetti bequeathed it, after the Italian explorer Giuseppe Maria Giulietti who was slain by Afars southwest of the lake. Another name for this body of water is Lake Egogi (or Egogi Bad), which is the name L.M. Nesbitt's Afar guide gave it when the Italian explorer became the first European to see it in 1928