The town is an ______ mix of Inca architecture and Spanish architecture of the colonial period --- from the 1500s to 1700s. When you walk along Cuzco's_____ streets, you can see large,_____ stone walls that date from the time of the Incas. Some houses and monuments are built on top of Inca foundations. From Cuzco, many tourists visit the ancient Inca ruins at Machu Picchu. Some____tourists walk up the _____ trails through the mountains to the ruins. This can take from one to four days depending in the route.A_____ way to the ruins is to take a ______ train ride to the town of Aguas Calientes and then a bus up to Machu Picchu.