In Schellenberg you can see 2 of the 3 ruins in the country. Obere Burg means Upper Castle and yes you guessed it there is a Lower Castle too. Check the other post.
The ruins are in good state( if you can say that about ruins) ,it is very clean and very well maintained.
Its a short visit but well worth.
My son loved it. He thought its one big playground for him to explore