“The linear building, which stretches along the existing car park, defines the boundary between pedestrian and automobile,” said the architects. Photography is by José Campos. Steel arcs curve across the glass facade of this Portuguese marina complex by local architects Barbosa Guimarães (+ slideshow). The waterside buildings are fronted with curved steel beams, which reference the framework of small gangways that connect the harbour wall and jetties. Related story: Palácio de Justiça de Gouveia by Barbosa GuimarãesThe complex, which faces Porto across the water, comprises three volumes. A wide flight of stairs at one end of the building leads directly to the upper floor, where the steps pass through a suspended hood that exaggerates the length of the upper storey. At the centre of the building, the glass facade detaches from the metal framework to indicate a ground floor entrance. Barbosa Guimarães was commissioned to design the Douro Marina buildings for a harbour situated at the mouth of the River Douro, an inlet from the North Atlantic Ocean. The two buildings – one housing a restaurant and the other a spa and gym – are accessed by pathways and steps that run up the back of the slope from the road and car park. The longest of the three structures runs parallel to the harbour wall, creating a paved promenade between an access road and the water. A long administration block runs along the waterfront, and two shorter blocks containing a restaurant and spa project off a slope to one side. Tube lights are set periodically into ridges of the corduroy-textured ceiling, and concertina shutters slide across runners to divide the open-plan space. Training and changing rooms, administration offices and event spaces inside are spread across the upper and lower floors.