Lake Gravenna from the Coalition Space Station
|Basin countries||Durnstaal, Saudi Jiddiya, Mulfulira, Vitosium|
|Max. length||350 mi (560 km)|
|Max. width||160 mi (260 km)|
|Surface area||31,700 sq mi (82,000 km2)|
|Average depth||483 ft (147 m)|
|Max. depth||1,333 ft (406 m)|
|Water volume||2,900 cu mi (12,000 km3)|
|Settlements||Durnen, Jiddiya City, Runuraq, Akleti|
Lake Gravenna is the second-largest inland body of water on Iearth, after Lake Greening in Zamastan. Gravenna is the largest of the East Adula Lakes, which include Lake Nora and Lake Lovap. Located between Durnstaal, Saudi Jiddiya, Mulfulira, and Vitosium, it is a naturally occuring endorheic basin (a basin without outflows), although various manmade canals have built flows that lead into outflowing rivers, such as in Vitosium.
The lake has long provided historical, economic, and cultural influence over the civilizations built along its shores. It provided the natural barrier and border of the ancient Emmirian Empire, as well as the Skithan Empire. It is abundant in natural resources, and today is exploited by the countries along its shores for that very purpose. With rich oil reserves, fishing habitats, and mineral deposits, the economies of many nations revolve around the lake. Protectionary measures by several governments have attempted to slow the effects of humans on the lake, including establishing nature reserves and non-mining or oiling zones in the lake. However, multiple man-made disasters, such as the 2002 Gravenna Oil Spill, have damaged the ecosystems of the lake.