Hydrogeological data from the site of infamous groundwater contamination near Woburn, Massachusetts. The movie, "A Civil Action", is based on litigation related to this  site.

Richard Winston's extensive MODFLOW website.

MODFLOW manual, written by Pete Anderson and published in 1993 by the US EPA, provides twenty tutorial style exercises for MODFLOW. The text and data files can be downloaded freely. This is an excellent way to learn MODFLOW on your own.

Download the demo version of gflow2000, an analytic element modeling code.