After leaving Machu Picchu on the second day there, we took the bus back down to Aguas Callentes and from there got on the train again back to the Sacred Valley where we were met and taken to Cuzco for a couple days.  We walked around the city a lot and also took a city tour visiting museums, churches, cathedral, the main square Plaza de Amas, a huge Inca Fortress, and Inca Baths, etc.  All very interesting.