I crossed the Andes mountains from San Pedro de Atacama (Chile) to Salta in Argentina. This lovely city has a relaxed vibe. I enjoyed some days hanging around the city watching the people on the central square (Plaza de 9 Julio) and having a view on the city from San Bernardo hill. As a real gaucho I did some horseback riding in the surrounding hills. It was great to enjoy the scenery that way, but the horseback riding caused some sitting problems the day after...
I was told about the blue-dollar-market in Argentina, so I stocked up on US dollars in Bolivia. In all Argentinian cities it was possible to change US Dollars for Argentinian pesos at a great exchange rate (I got 1.5 times more then I would have gotten at the bank). It felt a little awkward the first time to exchange money on the street, but with so many people screaming 'cambio' it seemed that the police was ok with it.