Hola. I have just been in Salta for the weekend. The train is not running but there are plenty of bus or 4wd tours available near 9 de julio square. I took a day tour yesterday which ran alongside a lot of the train track mostly on route 51, through the Valle del Toro, up to SA de Los Cobres, onto the salt plains, down through the Humahuaca valley & past the 7 colours sierra (jujuy)- long day but I would recommend it. It was 170 pesos. There are tons of other places - it may be worth hiring a car. It is worth a night out on Balcarce in Salta itself lots of music. Hope that helps.