The following are some of the places we have visited in the Western US or Canada,

Sedona
Yellowstone/Grand Tetons
Grand Canyon
Lake Powell
California - Big Sur area
Columbia River Gorge
Yosemite
Tucson area
Sante Fe
Moab/Arches
Canyonland
Capital Reef
Bryce
Zion
Glacier/Waterton
Banff

Our favorite place out of all of the above is Zion, with Banff second.
We were curious what the favorite place is of others who have toured much of the West?

I've been to all those locations a number of times. If I have to choose just one location, then it would be Yellowstone. All the scenic wonders of Utah in second place

Utahtea

Choosing one favourite place is very difficult.We've visited all except Tucson.All the National parks are without doubt wonderful.We specifically love Yosemite.But also Bryce is so unique.The road from Jasper to Banff and The going to the sun road in Glacier N.PArk are also two favurites of ours.PAul

Zion, Banff, and the road from Banff to Jasper are at the top of my list.

Oregon (Columbia River Gorge and Pacific Coast) and Colorado are great scenic destinations.

I LOVE the coastal drive along Oregon. I also second the Canadian Rockies. I preferred Bryce over Grand Canyon. There's so much to do in this area, I obviously need to go back.

As for cities, Vancouver was beautiful.