I have been to Nordschleife only one time, and I think that is definitely the nicest track of the world(I miss american ones..as laguna seca, Talladega or Indianapolis overall..)
I am (obviously) referring to the old track, closed to forumla one after Lauda crash in 1976 (he gave the name to that Kurve)
Is a magic place in a too typical atmosphere only germans can have, I deeply suggest everybody to get there also for the people u will meet.
One of the nicest event is the 24 hours race, usually done in july,and is incredible to see pilots reminding every corner of that magic track.
The new ring is much more modern and dedicated to formula one.
Monza is instead the "serious" formula one track down here, but is a too serious challenge mostly for engines and gearboxes.Ralph Schumacher was able to reach 386 km/h in his williams some years ago (in a formula one....with that ugly aerodynamics
) .
We hase some nicer places anyway as Mugello (toscana), Adria (friuli), Misano (emilia romagna, doctor Rossi home..)...but THE speed place always remains Milano's track.
Another magic place I really would like to see is the Tourist Trophy, maybe this year I can...