Between here and there and back again....

I just learned that I'm expected to attend a Conference in San Antonio Texas in August. I'll probably drive from California and bring my 8x10 camera along.
Are there any en route locations you'd care to suggest?

Seligman Arizona http://en.wikipedia.org/wiki/Seligman,_Arizona http://www.theroadwanderer.net/RT66seligman.htm http://www.route66seligmanarizona.com/
Monument Valley
Navajo National Monument Preserves see http://www.nps.gov/state/az/index.htm
Painted Desert NP & Petrified Forest NP same park see above
http://www.nps.gov/rt66/HistSig/