The tour usually start from KM 88, but if you go there on a private vehicle, KM 82 is the farthest you can get (the 6 KM walked was flat and the view was good). Out tour guide was getting very excited about the trip.
This ruin was discovered by Bingham (the one who discovered Machu Picchu). It was thought to be a farming station and the soldiers who look after the farmers stay in the place where I took the picture from.
A dead mouse. According to Inca believes, the spirit of this dead mouse is brought to the heaven by the condors and its spirit will live in the upper world before its body decayed. That's why people made mummies, just to keep the body fresh so the spirit can stay inside. If the body decayed, they will return to Pacha Mama (mother earth) and it won't be nice. That's also the reason why the last Inca Emperor rather joined the Catholic church so that he would die of hanging instead of burning.