I remember visiting Olot, in Catalonia, and thinking the mountains must trap pollution in the valley. It certainly looked striking: http://mjhoy.com/images/bar

I remember visiting Olot, in Catalonia, and thinking the mountains must trap pollution in the valley. It certainly looked striking: http://mjhoy.com/images/barca/10122014-P1200997.jpg http://mjhoy.com/images/barca/10122014-P1200997.jpg