Part of the gorgeous string of parks and walkways known as the Emerald Necklace, the Arnold Arboretum is a breathtakingly beautiful respite from the bustle of Boston—and is the oldest public arboretum on the continent. Located in the Jamaica Plain and Roslindale neighborhoods, the arboretum is a great place to have a picnic, go for a walk or just enjoy some peace and quiet in an enormous expanse of greenery. If you're a budding arborist, you'll enjoy a living museum of over 2000 species of flora, all with tags identifying their origin and taxonomy. Designated areas also group together specific trees and plants, such as lilacs, oaks and bonsai. Check out the Visitor Center at 125 Arborway for more information and updates on new and upcoming art exhibitions. For those less focused on science, walk to the top of Peter's Hill for excellent views of the arboretum and the city skyline. After an afternoon in urban nature, be sure to explore the Jamaica Plain neighborhood and stop by the ever-popular Ten Tables for a bite.