Enter campus from the northwest, near Park Avenue and Second Street, and you find yourself in an oasis—a palm-encircled pond hopping with slider turtles and fish, and watched over by the occasional heron. A few steps to the east, you're in a grove of olive trees whose high branches are home to raptor nests. Cross the vast lawns in front of the Arizona State Museum, and view a peculiar crested Saguaro and examples of common desert foliage all around Old Main. There are also muskily fragrant flowering pears and carobs. Any campus ramble will reveal an embarrassment of botanical riches, many of which are labeled with their common and scientific names, but for a more-orderly viewing of campus landscaping, there is an interactive map on the UA Arboretum website.
Runners up:
7366 N. Paseo del Norte
742-6455
3. Scott Avenue