Île-des-Moulins, a designated site since 1973
It's the heart of the city and its prettiest backdrop. Father Louis Lepage de Sainte-Claire, the fourth seigneur of Terrebonne, had a first flour mill built here as early as 1721. Five stone buildings remain today, including the 1803 bakery, the 1804 sawmill, the seigneurial office, and the 1846 flour mill that now houses the municipal library. Recognized as a historic site of national interest by the Quebec government, the place works as much as a park as it does a museum.