Fabulous sunset last night but we were so late getting in to our hotel, El Piñon, and getting settled in that we didn't get any shots. Feeling the altitude. Yesterday in Cafayete we were at about 1700 metres. Getting to the Puna yesterday we climbed and when we crossed the mountain pass that took us to Catamarca province in the Puna region we were, and are, at 3500 metres. When concentrating on other things altitude not particularly noticeable, but I woke up a couple of times last night very aware of being short of breath and of the need to breathe more deeply. V and I both have prescriptions for a drug that is supposed to minimize altitude symptoms which we were to have started taking two days before altitude....