No photograph or verbal description of the Grand Canyon is ever going to suffice. You just have to experience its overwhelming vastness and awe-inspiring splendor in person. Therefore, you should study it in case you go there! Make sure you know the temperature and animals that will be there so you're prepared.
Sunrise and sunset are spectacular at the Grand Canyon, not only that but other things there are interesting. It's not a boring subject, so why not study it?