Urban Landscape. Northwood. - Northwood Estate Christchurch. A Pergola, Arbor Or Arbour 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. 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. Photo