You can just about find anything you would ever need to know at Wikipedia. I was searching for a site where I could find a list of lakes by area size, and Wikipedia poped up. This site lists all the world's major lakes and their locations in order of size, area, volume, country flag, picture/shape of the lakes and much more....great research site for student reports!
OTHER WORLD LAKE SITES:
International Lakes Environmental Committee:
LakeNet (more categories of lakes: oldest, deepest, etc.)
Take a quiz about the 10 largest lakes in the world:
World's deepest lakes from the U.S. National Park Service: