Carol you are correct - Nuremberg Zeppelin Field where the major Nazi rallies in the 30s were held.

I stood at that platform and I can honestly tell you I could sense evil. I have been to many memorials and historic places and been moved, but never never have I felt evil.
And not sure I could even describe it today. I was very uncomfortable to stand in a place where the worst of the human race chanted.

TravelHat it has been used for formula track finish point, but not in many a year and also a HS soccer field.

The amphitheater structure was falling into ruins, and when I was there they were debating what to do restore or destroy.