The river reflects the last light of day, as the street lights start to blink into life.

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Some of the cruise boats (like the one above) blend into the evening scene, along with the working barges, but the boats of one major company are lined with floodlights either side to pick out landmarks for the benefit of their passengers.  The harsh white lights dazzle people along the quayside, particularly when the boats cruise slowly round Notre Dame cathedral, broadcasting their commentary loudly across the water.………

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Cars stream along the expressway, where children were building sandcastles two weeks ago. On Sunday, as usual, the road will be closed again for the day, and the tarmac will be taken over by cyclists, scooters, skateboarders and rollerbladers.   Next year, if all goes to plan, the expressway will be closed for good.

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Lights under the bridges, essential for the river traffic, also pick out the features of the different structures, their construction and character.  The solid stone Pont Neuf (top) is the oldest of the existing bridges.  It’s a plainly elegant structure at road level but the arches are embellished with a bizarre selection of carved mask faces.  Pont d’Arcole (below) has a central iron span between outer stone arches.  The iron supporting structure under the deck, hidden by day,  is highlighted at night, showing the abstract beauty of its functional geometry.

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