41 years ago today, on December 29, 1984 (November 8, 1984 in the lunar calendar), Switzerland built the world's highest subway. On December 29, 1984, the world's highest-lying subway was completed in the Swiss Alps and opened to traffic in Saas-Fé. This cable subway is 1.5 kilometers long, the train runs at a speed of 36 kilometers per hour, and can carry 115 passengers each time. Passengers can travel the entire journey in just three minutes by train and reach the Alps at an altitude of 3,500 meters. This subway is mainly for skiers.