For the purpose of this section, open space shall be defined as land which is not used for buildings, dedicated public rights-of-way, traffic circulation and roads, parking areas, or any kind of storage. Open space includes but is not limited to privately owned woodlands, open fields, streams, wetlands, severe hazard areas, sidewalks, walkways, landscaped areas, gardens, courtyards or lawns. Common open space may provide for either active or passive recreation.