At the east end of Reid Park on Alvernon Way, just across from the Doubletree's parking lot, stands Tucson's best tree. From a short main trunk, three graceful branches-actually more like secondary trunks-soar into the sky in a graceful arch over the road. An evergreen of undetermined species, the tree appears to have been lovingly pruned in its early years by some fastidious gardener who may have once tended a Zen monastery's garden in Kyoto. In fact, the tree resembles a giant version of a bonsai specimen; it's that artful. A bench sits under the tree, and, adding to the Zen garden motif, so do several boulders. The practical addition of a trash can only slightly detracts from the serene atmosphere.