Toronto,
If you think you'd like Monument Valley, go a few more miles to the NE and visit a second area called Valley of the Gods. It is very similar to Monument Valley except you can guide yourself and don't have to pay. You can also get closer to the formations for better pix as well.
For me, I haven't found a favorite vacation spot yet. I'm still searching as I haven't hit all of the lower 48 much less Alaska. I'm giving it the rest of my retirement for the search.