An interconnected network of parks and parkways that are part of a comprehensive and balanced system within a metropolitan area. The variety of park types and sizes within the system makes it possible to preserve and display the natural beauty of a region’s landscape while also providing a range of recreational experiences. The units of a park system can include: city squares, playgrounds, small neighborhood parks, large parks, scenic reservations, boulevards and parkways. The parks are typically connected by paths and parkways that serve as linear parks to create a larger green network within a metropolitan area. This interconnectivity is famously associated with the Olmsted, Olmsted, and Eliot plan for Boston’s Emerald Necklace.