About 620 thousand people.

Salta is a beautiful colonial city in the mountains of northwest Argentina. People call it Salta la Linda, meaning Salta the Beautiful, because of its lovely old buildings and colorful hills.
You can ride the cable car up San Bernardo Hill for a great view, explore old churches on the main square, and take the famous Train to the Clouds high into the mountains. The nearby valleys have rocks in many colors.
The Train to the Clouds climbs so high into the Andes that it feels like you are riding through the sky over tall bridges.
Nearby valleys have hills striped in red, green, and purple rock, looking like a giant painting made by nature.