What about the altitude?

Well we've been drinking mucho water, had some mate de coca in Lima, but this was not quite the real macoy, in a bag. Upon landing in cusco we all felt a little light headed, but it could have been the combination of long journey, lack of sleep and altitude, but really not bad. As soon as we checked in at our hotel we had the real stuff. It tastes herby and quite pleasant. After a good nights sleep we feel good at the start of day1, but of course we have't done any hiking yet, just strolling about town. feeling good on day 1, bright sunny day with deep blue sky.