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The Liurnia East Map is located north of the Lake Shore Site of Grace on the flooded road towards the Laskyar Ruins, guarded by Revenants, and is one of the many Key Items found throughout Elden Ring.
The Liurnia East Map is a Map Fragment located at one of the large steles in the Lands Between, which will uncover a portion of the world map to show more details, topography, and bodies of water in the southern and eastern portion of the Limgrave region.
You can find the Liurnia East Map down at the Lake Liurnia itself, just past the Liurnia Lake Shore site of grace, guarded by several wraiths hiding by the trees.
You can check out our full Elden Ring map for even more locations.