Apparently deeper than the Grand Canyon, but not a spectacular. That said it is still impressive. Seeing half a dozen condors soar over head at close quarters was pretty special. Took some cracking shots on the SLR of them.
The hike back up the canyon on the second day (1,200m climb) was a bit testing as I think the llama meat of the previous day hadn't agreed with me.
Some of the rock formations in the canyon are similar to the Giants' Causeway.
The terracing of the fields makes for a picturesque scene.