Caspian Sea
The Caspian has characteristics common to both seas and lakes. It is often listed as the world's largest lake, although it is not a freshwater lake. It contains about 3.5 times more water, by volume, than all five of North America's Great Lakes combined. The Caspian was once part of the Tethys Ocean, but became landlocked about 5.5 million years ago due to plate tectonics. The Volga River (about 80% of the inflow) and the Ural River discharge into the Caspian Sea, but it has no natural outflow other than by evaporation. Thus the Caspian ecosystem is a closed basin, with its own sea level history that is independent of the eustatic level of the world's oceans.
Lake Manych-Gudilo
A global sea level rise of roughly would cause the ocean surface to be higher than the highest point of an area between the ocean and the Caspian, forming a narrow channel straddling the lake in the area between the Sea of Azov and the Caspian Sea, potentially placing the Caspian Depression area under water.