If you've driven west out of downtown on Congress, you've probably spotted this place on the north side of Congress, just west of I-10. Giant monoliths stand nearby; the one closest to Congress is covered with brightly-colored tile:
You can see a wide shot of the pathway running through the park, and a plaque with more information about it, in the entry Sentinel Plaza on the Tucson's Pocket Parks blog. Here we'll focus on the art.
All along the meandering path through the park are colorful small tile works. There's a lot of variety in the tilework. For instance, this one, titled T U C S O N, shows scenes from the city:
Toward the north end, another monolith:
This place is easy to reach by bicycle, too: It's near the east-side part of The Loop, a bike path that follows Tucson's (usually dry) rivers.