Starting from Styria: simply put, I was in Graz just like Simone would go visit the Waikatoians, and they made sure I see the best of the city. My logic was: if Schlossberg (from Der Grazer Schloßberg) means castle+mountain, then if fortress is burg, that means a fortress on a mountain must be called Burgberg... it made so much sense yet they insisted no.