Many walk the Incan Trail for a few days and camp out before Machu Picchu ... I took the train thanks.

Above is the Temple of the Three Windows. Below is the Intihuatani stone. As stated in the video, these two, and the Temple of the Sun were the most spiritual of places at Machu Picchu. Much of everything had to do with astrology and animal spirits.

Terraces were used for farming and to prevent erosion.

Temple of the Condor.

Animals still inhabit the area! Many llamas walk the land around Cusco and the Sacred Valley as well.