A few months ago I was visiting the Colca Canyon in Peru. With 3.269m depth it is the second deepest canyon in the world! Pretty impressive by itself, you will also have the 100% chance to spot Condors with up to 3m wingspan so it is definitely worth visiting. The road from Arequipa to the canyon will bring you up to more than 5.000m, be prepared for the altitude sickness to hit you HARD... Anyways, it is an amazing place to visit!
See you in Peru, the most amazing country to travel in Latin America :-)