This document defines and discusses the components of urban open spaces. It begins by defining urban open spaces as all types of spaces between buildings in a town, including paths, squares, gardens and parks. It then discusses the importance of urban open spaces in giving form to cities, providing recreation space, and encouraging social interaction. The document outlines different types of urban open spaces such as waterways, parks, green areas, and plazas. It provides details on the components, surroundings and landscapes of parks, greens, playgrounds, plazas and squares. It also discusses the physical components that make up urban open spaces, including walls, floors, roofs, and hardscape and softscape furnishings.