Built at the end of the Second Empire by Jean-Baptiste Mignon, an engineer and famous patentee of some 100 inventions and collaborator of Eiffel, Château de Walmath is set in a magnificent English park. It boasts original architectural features, including an impressive copy of the Légion d'honneur staircase in Paris. Visitors can also admire superb greenhouses, an orange grove and a pond with rockery bridges and rhododendrons in bloom. This English-style park, created in collaboration with landscape architect André Laurent, has retained some of its original trees. Other species were imported from America, as was common at the end of the 19th century. Visits by appointment only.