By rights I should save this for next week's Sunday Burst, but it's too good for that. xkcd brings the infographic goodness to the depths of the large lakes and oceans.
Note the depth of Lake Erie, relative to the other Great Lakes -- that's why Lake Erie usually freezes over during winter (although not so much the last couple of years, and in the future, who knows -- thanks, Global Warming!).
On a related note, I think that we may be living in the Golden Age of Infographics. I love losing myself in these things!