It can't compete with most of these big-city urban canyons, but I have to say that Salt Lake City does have a lovely Main Street with a great mix of old and new buildings. It's really the only location within probably a 300 mile radius that even resembles an urban canyon.
https://www.google.com/maps/@40.7678...7i13312!8i6656
Source: SOM
Easy access to amazing natural canyons too