If you are looking for a train journey through heaven, then this is that journey. Glacier express is slowest express train connecting the two famous resorts in Switzerland, Zermatt and St. Moritz. The trip over this train is 7.5 hrs long and passes across 291 bridges and 91 tunnels. It reaches the highest height of 2033 m at Oberalp pass. The views throughout this train journey are mesmerizing, as it passes through lush grasslands and snow mountains.