This train line between Salta and San Antonio de los Cobres (Argentina) is sometimes called "Tren a las nubes".­ For more information, read en.­wikipedia.­org/­wiki/­Tren_­a_­las_­Nubes

dolly draisine metric gauge motorized narrow gauge noroeste argentino rail trolley railroad construction railroad speeder railroad tracks rails railway tracks single track track maintenance tren a las nubes workers ZMCN 156
Route 51, Bolivia

Photos taken in Argentina in Februaty and March 2010.­

Related series:

- Bolivia