Here’s the one I went to, in Turckheim:
http://www.cheminsdememoire.gouv.fr/en/battle-colmar-pocket-memorial-museum
This, the Audie Murphy site, and the U.S. memorial and French military cemetery on a nearby hilltop would be must-do items for me. The views from the memorial give you a good idea of what the fight would have been like. Lots of wide open terrain with good fields of fire favoring the defense.
Plus just visiting downtown Strasbourg and the cathedral is nice.
Thanks, FP!