Decks: is a structural element of a garden that could be called in Spanish as a terrace. A deck is a terrace of natural wood or composite wood recycled plastic materials (Greendeck) may be elevated or not, on the ground.
To install a deck, rely firmly on the ground form (usually by concrete footings) a set of wooden pillars, steel or aluminum. The pillars bear a slab of wood, steel or aluminum anchored to them. On the stage of manufacture plastic lumber (Greendeck) or natural is eventually placed
Pergolas: is a garden feature forming a shaded walkway, passageway, or sitting area of vertical posts or pillars that usually support cross-beams and a sturdy open lattice, often upon which woody vines are trained. The origin of the word is the Late Latin pergola, referring to a projecting eave. As a type of gazebo, it may also be an extension of a building or serve as protection for an open terrace or a link between pavilions. They are different from green tunnels.