Traveling on the Glacier Express - Just moved to Switzerland

From Zermatt to St. Moritz, an 8-hour train adventure between two world famous Swiss destinations, across 300kms of mountain landscapes, bridges, viaducts and tunnels in the stunning scenery of the Swiss Alps. Here are my impressions and tips from our December winter-wonderland travel on the Glacier Express, a trip that I wanted to do from the moment I heard it exists.