A pergola is an outdoor garden structure with vertical posts supporting cross-beams and an open lattice roof, creating a shaded walkway, sitting area, or passageway, often used for training climbing plants like vines or roses to form a natural canopy. It's defined by its open, grid-like roof, lack of walls, and supportive structure (posts, beams, rafters), providing aesthetic appeal, partial shade, and a focal point for gardens or patios, and can be freestanding or attached to a building.
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