The following is from 'The Tiger: A True Story of Vengeance and Survival' by John Vaillant
The taiga was at its winter finest and seemed made for the eyes alone: the sunshine was so brilliant, the snow so pristine, the sky so depthless, the stillness of the forest so profound that speech or motion of any kind felt like an intrusion.
What does 'be made for the eyes alone' mean here?