Tren de las Nubes

Unfortunately, one of the world´s most famous train rides is not possible at the moment. Some serious maintenance work is happening on this train line which climbs 900 km from Northern Argentina (Salta) across the Andes into Chile. The line has 21 tunnels, 13 viaducts, 31 bridges and lots and lots of zig zags. The picture is of La Polvorilla is at 4190 m above sea level and is supposedly the highest bridge in South America. Very impressive. To be honest I was a bit relieved the train service is suspended.... not that I doubt Argentinian engineering but... it is very very high up!