Throughout Nichols Arboretum, called the "Arb" by locals and students and located near the University of Michigan''s central campus, you'll find many special places. The Arb has extensive but dispersed collections of native and exotic trees and shrubs masterfully crafted into a naturalistic landscape begun by O. C. Simonds in 1907. As you explore you'll find one of the richest landscapes in the region that presents vast panoramas, broad valleys, and intimate dales and glens. Special features of the Arb include the Peony Garden - the largest collection of heirloom peonies in North America - river settings, trails, a prairie, amphitheater, visitor center and more. Free admission.