Reservoirs on the Don and Volga Rivers, Russia48.7N 44.5E
Several rivers and lakes seem to come together towards the center of this image of Russia. In the upper right quadrant is the Volga River, visible as a thin, almost horizontal line extending westwards from the right edge, which meets the Volgograd Reservoir, a thicker vertical line extending southwards from the top edge, at an almost right-angle.
In the upper left quadrant is the Don River, which follows a more meandering course towards the center of the image. A dam on this river creates the Tsimlyansk Reservoir (or Tsimlyanskoye Reservoir), visible in the lower left quadrant.