I LOVE Fusion! The best ever festival I've been to. I go every year. Unfortunately this year no edition, but after 20 editions I think they deserve a break. But next year, I for sure will be enjoying the next edition of this super festival!
Turmbühne, the Techno stage! A place I generally spend quite a bit of time. Tanswiesse, or Tanzwüste how it is called since the last year or two, is maybe the best stage, the sound is for sure the best I ever heard in my whole life! And music is Techno House, Techno and variants of this genre.
Last weekend I've been to a new festival in the Netherlands, Wildeburg (here); a festival with great inspiration by Fusion. People attending was a bit more the type of open minded dance music lovers, and less hippie type people, but the atmosphere was super. Still, Fusion is better than WIldeburg, but for sure I'll plan to not miss future edition of our Dutch Fusion :)
I can imagine you like Fusion and the Turmbühne - we should have a Techno MeetUp once for sure (Uwe commenting)