I have a weak spot for reading about (and visiting) city works projects and infrastructural wonders, indulged most recently by paging through Kate Ascher's The Works. Anatomy of a City on New York. This is why this short piece in Le Monde on the réservoir de Montsouris, one of the principal water supply reservoirs for the city of Paris, caught my eye. The photographs of the deep blue water were gorgeous, and I have a sweet spot for any nineteenth-century public works projects that are still working--so many still functioning today seem to date from the blitz of infrastructure projects in cities of the early 20th century. Unfortunately, it appears the article has now sunk below the pay wall. A similar piece, however, can be found here (but sadly without all the glorious photos).