Other nearby Inca sites are : Pachacuti 's presumed winter home Machu Picchu , which can be reached by a lightly maintained Inca trail ; the `` fortress '' at Ollantaytambo ; and the `` fortress '' of Sacsayhuaman which is approximately two kilometers from Cusco . The major nearby Inca sites are Pachacuti 's presumed winter home , Machu Picchu , which can be reached on foot by an Inca trail or by train ; and the `` fortress '' at Ollantaytambo .