Purmamarca is a very small town and 2 hours in it is enough to see everything. I think one day tour to Salinas and Purmamarca is a better fit. On the second day on a way to Humahuaca and back to Salta our bus made a few stops but not so interesting as at Salinas and Purmamarca. On the 1st day our tour guide was Julio who provided a lot of info not only on Spanish but on English for 3 of us. On the 2nd day the different tour bus picked me up in Purnamarca to follow to Humahuaca and back to Salta. I was the only English speaking tourist and all info I got from new guide, Maria, was names of the places and how many minutes we have before coming back to bus. However she spoke nonstop with the rest of the group knowing I can't understand anything. It was very disappointing.

Mountains, salinas, cactus, lamas, vicunas, roads, villages. But 14 hrs in a bus, try to avoid back seats.