Don't fall off the edge! Note for Americans: this is not Disneyland. There are no safety barriers or nets. If you get too close to the edge, you will fall off and die. At least ten people a year do, apparently.
Keep hold of young children. This may seem like stating the obvious but we actually saw a stupid woman just open the car door and let two little kids aged about 7 and 9 just run to the edge ahead of her.
It is a bit obvious really but you will be surprised how many people don't - stay away from the edge and don't attempt rock-climbing.
It's a long way down.
What photograph can do it justice?
But I tried I tried.
God its AWESOME !
Building a fence around the Grand Canyon would ruin the view. Nobody wants that, and so there is no fence. So watch your step, especially if you go in the winter like I did.