DH wants to go to this area next summer, because he has family connections there (geographical - we wouldn't be visiting anyone). We have two teen boys and I'm a bit worried that DH's idea of fun (basically a driving trip around the area) will be utterly dull for them and would be better done once they're off at uni and we're on our own.
I've been to Alsace (the French bit) when I was a DC and remember it was beautiful, but pretty towns don't make for a fun summer holiday when you're 14 and 17! The only thing I can see that might be semi-fun for them is Europa Park, but I don't know the area well and maybe I'm missing things? Does anyone on here know Alsace/Baden well? We will be driving from the UK and I see Lake Constance is only about 2.5 hours from Strasbourg, so spending some time by the lake would be possible.
Edited to say: DS1's idea of a good time is not too much travelling around, a decent gym, beach and chill time, and DS2 likes quality pool time. They both enjoy doing active things like walks, but not if it's really hot (above mid-20s celsius). They both enjoy eating out and trying new foods.