The Great Bird Lake is a large lake located toward the center of the continent of Zarhanna, on the world of Lezaria. Shaped roughly like a bird in flight, it is the largest freshwater body of water on Lezaria. Although not actually within the boundaries of any country, the independent city-state of Bird's Eye is located on an island within the lake.

To the south of the Great Bird Lake lies Reezahn and Tregas Valley, to the west lies Garateck and Tominia, to the north lies Celevia, and the east lies Dorackelleth.