The increasing changes in the terrain as we moved from Las Vegas towards Arizona. The large open spaces. It puts you in your space, so to speak.
I loved the mixture of textures. The spiky trees amidst rolling hills and desert. Then, you had wispy clouds as a backdrop.
Did I mention the vast open spaces? Staggering. There's a whole other world out there.
In the words of my 11-year old - it was Epic.
In my words - Unforgetable.