What is the most beautiful mountain range you have climbed in?

Which did you personally enjoy the most, and find the most beautiful and atmospheric?

Alps (Pennine; Maritime; Dolomite; Julian; etc.),

Andes (Southern; Central; Northern),

Himalayas (Great; Lesser; Outer; Karakoram, etc).

Or any other range?

For those of you who have experienced hiking / climbing in more than one range, of course.