Lake Baikal is most famous for being the deepest and most voluminous lake in the world [assuming you don't count the Caspian Sea]. For me, the most striking feature isn't the deepest point, but rather, the average depth at 744 meter. The bathymetry, instead sloping to the lowest point, it has steep sides and a flat bottom. Image a fjord, although it isn't glacial in origin, rather tectonic. This oblique DEM gives another perspective.