A pergola is an outdoor garden feature forming a shaded walkway, sitting area or passageway, of vertical posts or pillars that usually support cross-beam, often upon which woody vines are fitted .
Word pergola, referring to a projecting eave. It also may be an extension of a building or serve as protection for an open terrace and garden . They are different from green tunnels, with a green tunnel being a type of road under a canopy of trees. Pergolas can made from wood or metal materials ,may link extend from a building's door to an open garden feature such as an isolated terrace or pool. Freestanding pergolas, those not attached to a home or other structure, provide a sitting area with a great scene and beautiful view that allows for breeze and light sun, but offer protection from the harsh glare of direct sunlight, and give a comfortable space for setting area .