The Arboretum on the Davis campus is divided into regions reflecting international geography. The Australian region has bottle-brush trees and some odd-shaped small flowers. The California region includes coastal redwoods, wildflowers, valley oaks, and native redbuds. The Arboretum is very narrow, as it follows a watercourse that's inside concrete banks, and goes under several big roads that give access to the campus buildings. At intervals, the paths alongside the banks go up the hillside towards one of the buildings. The design is impressive: you feel as if you are in a natural area, separated from city life -- but you aren't.