I made it to Arequipa on an overnight bus and I probably would not repeat the experience! Arequipa is lovely. It’s much quieter than Lima and surrounded by snow capped volcanoes.
One of the interesting thing that was found on one of these mountains is Juanita. Juanita is an Inca girl that was sacrificed on the mountain and remained almost perfectly preserved since she was frozen. They call her the frozen mummy. You can go to a small museum and watch a video about her and then you can actually see Juanita. They kept her frozen in a case at -20 degrees Celsius. Unfortunately they do not allow pictures, which is a shame.
The cathedrals in Arequipa are also quite spectacular. A lot of the buildings in this area are made of rock from the volcanoes that surround the city. There is also a nunnery that takes up an entire city block which people call a city within a city.