These incredible maps of the Mississippi River were created in 1944 by Cartographer Harold Fisk and in  Geological Investigation of the Alluvial Valley of the Lower Mississippi River.  In great detail he mapped the twisting and changing path of the river over time in these swirling rainbow colors.  The result is the most amazing set of info-graphics presented in a beautiful way.  The high resolution files can be downloaded from the U.S. Army Corps of Engineers.

See more: http://lmvmapping.erdc.usace.army.mil/