Ludwigsburg is lovely. Big baroque palace with grounds. And the little town itself is very pleasant. If you can wait a few weeks, the Christmas market will be getting under way.
Heilbronn, and surrounding vineyards?
Burg Maienfels ?
Schloss Waldenburg ?
I’ve not been to any of these monuments, just the wine tasting in and around Heilbronn, clearly that says something about me…