The Arnold Arboretum of Harvard University is a museum of trees teaching the world about plants. Join the COA as we drive through acres of green and walk among the flowers. After our visit to the Arboretum, we will stop for lunch at Pepe’s Pizza at the Chestnut Hill Mall. We’ll return to Concord by 3:00 PM. The cost of $35 includes transportation and lunch. Space is limited. Please call to sign up at 978-318-3020 starting May 1st.