Le Locle is known as a center of Swiss watchmaking, even cited as the birthplace of the industry, with roots dating back to the 1600s. The municipality has been home to manufactures such as Mido, Zodiac, Tissot, Ulysse Nardin, Zenith, Montblanc, Certina as well as Universal Genève, before the latter company relocated to Geneva. The town's history in watchmaking is documented at one of the world's premier horological museums, the Musée d'Horlogerie du Locle, Monts Castle, located in a 19th-century country manor on a hill north of the city. Restored historic underground mills (grainmill, oilmill, sawmill) can be seen in a cave located about one kilometer west of the city center.
The Ancien Hôtel des Postes, Monts Castle and the Museum d’horlogerie, City Hall, the Immeuble, Moulins souterrains du Col-des-Roches (Cave mills in the Col des Roches), the Villa Favre-Jacot and Zenith SA are listed as Swiss heritage site of national significance. It is part of the UNESCO World Heritage Site: La Chaux-de-Fonds/Le Locle, Watchmaking Town Planning (since 2009) and the entire town of Le Locle is part of the Inventory of Swiss Heritage Sites.
References:The Château du Lude is one of the many great châteaux of the Loire Valley in France. Le Lude is the most northerly château of the Loire Valley and one of the last important historic castles in France, still inhabited by the same family for the last 260 years. The château is testimony to four centuries of French architecture, as a stronghold transformed into an elegant house during the Renaissance and the 18th century. The monument is located in the valley of Le Loir. Its gardens have evolved throughout the centuries.