to only visit Machu Picchu with a night sleep in Aqua Calientes will pay almost as much as those who will do one of the treks to Machu Picchu. I have heard lots of positive stories about the four days Inca Jungle Trek, with on the forth day the visit to Machu Picchu. This is a activity trek and is almost as expensive as the Salkantaytrek. On the first day you will have downhill biking, the second day is hiking and zipping (optional), the third day is equal to the forth day of the Salkantaytrek. Lima Do not miss the monastery with the tombs in citycentre. You can not take pictures inside, but the monestary is one of the most beautiful ones in South America. Cobanaconda It is worth to stay two or three nights in the Canon del Colca instead of doing it as a daytrip from Arequipa. The hike from Cobanaconde down into the canyon and then back to Cobanaconde, do it in two or three days. I was able to do it in one day, but it was pretty exhausting. Those who don't have a good hike condition definitely can not do it in one day. And I think it is better to do it in two days. Trujillo Interessting huge plaza in downtown Trujillo. The nearby Huaca del la Luna ruine is getting more and more interesting. The archeologists are working since 1991 in this temple ruine complex, slowly recovering more and more. Very informative tour