The first day in Cusco, Peru, was a struggle. At over 11,000 feet, it takes time to acclimate to the thin air. It was difficult to breathe and nearly impossible to do any physical activity. Even walking was difficult. The locals sell many products made of coca leaves which they say helps to counteract the effects of the altitude by acting as a stimulant. I personally did not find this to work, and the grassy taste of the leaves was not conducive to consuming large quantities. There were many wonderful scenic views of the countryside and the Andes mountains. Our trip included a visit to Machu Picchu, the striking mountain formation and Incan ruin.