We will be driving from Heidelberg to OT Rothenburger in a couple of weeks. When I use google maps the main route takes approx 1 hr 40 min (I know they and Viamichellin provide a modest time frame, so I usually tack on extra drive time). When I use google maps and put in each town the route now takes 3hr 20 mins without stopping at all. I do love castle and would like to see several but just can not fit all of them in or else we won't have anytime to enjoy Rothenburg. So my dilemma is deciding which ones to make sure to see or to stop at. Do you have any recommendations? Of course the castles in Heidelberg and Rothenburg are already included.