Question Where to Stop Between Budapest and Graz?

Hi! We're a family of four (2 adults and 2 teens) planning a 35-day road trip through Central Europe this summer. We'll be driving from Budapest to Graz and are looking for suggestions on where to spend 3-4 nights in between. We're interested in places with a mix of culture, nature, and maybe some adventure activities that teens would enjoy. Any recommendations for towns or areas that are worth a stop? Also, any tips on family-friendly accommodations or must-see spots along the way would be super helpful. Thanks in advance!