City smells

While traveling over Europe by train two times in my life, I stopped in many capital cities. Each and every one of them had a certain smell when I stepped off the train. Actually, it happens the same when you step off the plane... Anyway, cities have certain smells and today it smells like in Brussels in Ljubljana. It is quite cold and the sky looks rather dark and gray. It feels good but I wouldn't mind to enjoy in some hot summer days again.