The 11 Coolest Train Trips in the World

This Argentinian train service, otherwise known as Tren a las Nubes, connects the country to the Chilean border. The high-altitude trip starts low in Salta and eventually reaches 4,200 meters above sea level. Cross 29 bridges, through 21 tunnels, around two spirals and two zigzags — it's a unique journey that hasn't yet lost its magic.