We are going to be in Arequipa for three days in October before going to Cusco and hiking the Inca Trail for four or five days. We're debating whether to spend two of the three we have days in the Arequipa area visiting the Colca Canyon. We are inclined not to go to Colca in part because we would rather not spend so much of our time in a bus or car (to and from Colca) and in part because we don't want to do a lot of hiking at altitude before getting on the Inca Trail. In addition, although I am sure Colca is very different from the Grand Canyon, we hiked in the GC in May. So, three questions.....1) is it worth spending two of our three days in the area going to Colca? 2) if not, is there enough to see and do for three days in Arequipa? 3) Are there other interesting sites near Arequipa? Thanks!