I was recently riding this run on a non-Glacier Express (requiring a change in Disentis-Munster): (1)the announcements were in German and a second language--was this Romanche? (2) I travel to Switz. often and am impressed with the magnificent scenery--except, the stretch between DM and Andermatt, is treeless and extremely barren, what geographic anomaly causes this? I've been high up in the alps and seem to remember seeing trees.