Under a public-private partnership with Harvard University, the 265-acre Arnold Arboretum is planted with over 15,000 exotic trees and flowering shrubs. This gem is pleasant year-round, but it’s particularly beautiful in the bloom of spring. Dog walking, Frisbee throwing, bicycling, sledding and general contemplation are encouraged (but picnicking is not allowed). The southern Forest Hills gate is located on the Arborway just west of the metro station.
A visitor center is at the main gate, just south of the rotary at Rte 1 and Rte 203. Free one-hour walking tours are offered several times a week from April to November.