Hmm, the word 'German' dosen't spring to mind at a glance but it's still a nice build. One thing I would recomend is to add some texture to the rocky ground with more flat plates stacked in a rippling effect. I actually just made something similar (going to post it soon) except with black sludge and a Post-Apoc feel to it. But I love the lava, esp. the plumes of fire, very nice!