The most important tip in Peru is: haggle! When taking a taxi, choosing a package tour, going shopping and eating out. They start with prices for European tourists and then ask how much you want to pay. I did not think the weather would change so suddenly, neither that the sun would be so hot this time of the year (May).
We bought a tour package for Valle Del Colca, 150 km north of Arequipa. We spent 2 days with people from several nationalities. The goal was to visit the famous canyon, but everything else amazed me: the culture is so different from the rest of the country and the view is spectacular.