At the end of October we went on a short South American adventure to Peru, primarily to visit Machu Picchu. On the way we spent 2 night in Cusco, a city situated deep in a valley at 11,000 feet above sea level! We stayed at the Hotel Monasterio, a converted monastery. These buildings were, without doubt, the oldest I had ever stayed overnight in. Creature comforts in the hotel included Oxygen piped into the rooms so that the lungs received as much Oyxgen as they normally would at 8000 feet.