Balkans!
Why doesn't anybody think of Balkans?
ex-Yugoslavia with Adriatic sea, Albania, Kosovo.. NATO airbases in Italy.. so much diverse scenery, coastline with 1000+ islands, fantastic actual cold war infrastructure, e.g. the most expensive underground airbase in Europe, just look at it (original clips from '70s, sorry no english subtitles)
And down below a short story about it in English..
And there are tons of stuff like this, it's a cold war jackpot map, also with rich WWII history as well as '90s conflicts involving several NATO interventions with actual shooting down of several Yugoslav Mig-29s, and USA F16 and F117. LOTS of history to play with.
Would be delighted if anyone should consider it