You got some good shots. It's a pretty barren place. Not many trees around there. I visited the Grand Canyon briefly some years ago. You cannot appreciate the scale unless you have been there. plenty of potential for falling to your death, but I think that's just Darwinism at work.
The canyon is vast and I have been there several times. A fence would be out of the question as it's miles long. There's not a lot in Lanzarote, it's very barren and volcanic, but there are the views.