The Mississippi River

I've always loved the Mississippi, it basically rips right up the middle of our country. Anyone have any cool pictures or statistics on this river or its feeders? The terrain it runs through is amazingly diverse....headwaters up near Canada, bluffs through the midwest, swamps in Louisiana. Here are some shots I found of the Mississippi River in Iowa (where I'm familiar with it). What else do you have from the rest of the country??? >