My wife and I are returning to France in September of 2020 and will be staying for a bit in Colmar. My wife has been interested for several years now in visiting Switzerland and I'm wondering if there is something interesting near the German border. We could either visit something in that area as a day trip from Colmar, or actually stay there a couple of nights if it were an interesting town.
Our primary interest in our travels so far has been cathedrals, castles, old town city centers, and ruins. We have no particular interest in shopping, unless it might be in some of the small touristy shops carrying locally produced items. No museums. I'm not sure what exactly is attracting my wife to Switzerland as I've never actually researched it. I'm personally a bit dubious that this is actually something we should put on the agenda, but I'm prepared to be convinced otherwise.
Our next stop from whatever is suitable in Switzerland will likely be Heidelburg. We MUCH prefer traveling by train.
Any thoughts would be appreciated.
Talk to me like I'm 4 years old and it will help :)