Add Nürnberg and Hannover to the list - in fact pretty well all German airports see viewing facilities for the non-flying public as an essential part of airport planning.
The UK is disgraceful, given that spotting and photography of aircraft is such a big hobby here. Sad thing is that the UK mantra of "security is paramount" combined with rampant commercialism has lead to their almost total demise.
I undertand that the security excuse also makes train spotting and photography more difficult these days.
UK a free country - my a**e!