Train to the Clouds is a tourist train service in Salta province, Argentina. The third highest railway in the world, it was originally built for economic and social reasons, but is now primarily of interest to tourists as a heritage railway.
Beautiful stripes in the landscape of the Quebrada de Humahuaca, a narrow mountain valley located in the province of Jujuy in northwest Argentina, miles north of Buenos Aires. It is about 96 miles long. - photo from Geology IN