I have presented only a couple of images from the Grand Canyon here.  This is mostly due to the fact that many people have been there, or at least seen many of the standard shots.

In this instance, one of the most interesting things I noted was the highly irregular rock structures and the (apparently) innate tendency for people to go climb out on them.

As with the above image, this one likewise attracted a number of more personal visits.  In this case, the parent does not seem to be overly concerned for the potential fall.

The next day of our journey, we visited the Antelope Canyon.  These are incredibly interesting geological formations, generically known as slot canyons.  They are around 40 feet deep and vary in width from 3 to 20 feet in places.  Here is an intriguing spot in the canyon where an apparent shaft of sunlight is streaming down into the canyon.  The reality is that this effect is only visible during the middle of the day, so not all visitors get to witness this.  Although the air temperature around the area was in the low 100's (F), the temperature inside the canyon was very comfortable, if not every so slightly damp (an odd sensation for Arizona!).