In a word: epic.
Grand Canyon National Park is so amazing, you have to stop occasionally to remind yourself that you're really there, and that what you're looking at is really in front of you, and not just a postcard or something projected onto a green screen.
We hiked three miles into the canyon and looked back up the wall of strata, humbled by scale and the power of nature. We caught a vibrant sunset and a truly breathtaking sunrise over the Grand Canyon before continuing east.