mulb511, former valley of the sun resident Bill here,
....now to throw this for a curve. Do you realize the elevations you'll be at? This is high desert/mountains and Flag is 7000 feet. It's Arizona's ski area. Mid January is why scottsdale, Spas, and golf were invented. Lots drive up from Phoenix to the GC, yours is a interesting reverse.
. That said, based on your love of buildings, you've got to go to Prescott and on to Jerome, a Copper Mining Town that slid down the Mountainside, turned ghost town, and now has experienced a rebirth. Sedona has red rocks and mystic mumbo jumbo, but Prescott has a real 4 sided town square, old buildings, and a life. Huge 4th of July celebration every year. Tuba City's a haul through wintertime landscapes, but the navajo and hopi reservations are unique. Listen to
KTNN< AM 660 for a idea of how far from New England you are. As you descend from Flag, the air gets warmer and winter
lightens up. http://www.azjerome.com/
If you love Frank Lloyd Wright you've got to get to scottsdale to see Taliesin West sometime in your life. http://www.franklloydwright.org/index.cfm?section=tour&action=taliesinwest
Almost forgot, If you take 66 west out of Kingman, it's twilight zone time. Narrow Hwy that goes to the town of Oatman, an old gold mining town floating in the desert in the middle of nowhere. You have to come back to 93 though, or continue on to the Colorado. .http://www.oatmangold.com/rt66.htm Also, consider renting something with 4 wheel drive for your journey. Another place you must go is Arcosanti, Paoli Soleri's new age community at cordes junction, Arizona(just a little bit further down I-17) http://www.arcosanti.org/
Usually something cultural going on and they have a cafe there. Extremely worthwhile!