In 1853, Haussmann hired an experienced engineer from the corps of Bridges and Highways, Jean-Charles Adolphe Alphand, whom he had worked with in his previous assignment in Bordeaux, and made him the head of a new Service of Promenades and Plantations, in charge of all the parks in Paris. Alphand was charged to make a new plan for the Bois de Boulogne. Alphand's plan was radically different from the Hittorff-Varé plan. While it still had two long straight boulevards, the Allée Reine Marguerite and the Avenue Longchamp, all the other paths and alleys curved and meandered. The flat Bois de Boulogne was to be turned into an undulating landscape of lakes, hills, islands, groves, lawns, and grassy slopes, not a reproduction of but an idealization of nature. It became the prototype for the other city parks of Paris and then for city parks around the world.