Tips on what to see along / near this route.

At Panaca, NV the detour to both Cathedral Gorge State Park, and Echo Canyon are advised.

Suggested detour, at Cedar City, I'd go South in I-15 t0 SR 17, to La Verkin, taking 9 through Zion N.P. to Mt. Carmel Junction,
then head North in 89 to 12.
DG
 
At Panaca, NV the detour to both Cathedral Gorge State Park, and Echo Canyon are advised.

Suggested detour, at Cedar City, I'd go South in I-15 t0 SR 17, to La Verkin, taking 9 through Zion N.P. to Mt. Carmel Junction,
then head North in 89 to 12.
DG

Great, thank you. I’ll have a look at this!