Châtenay-Malabry, in the Hauts-de-Seine department (92), is getting a new green lung with the opening of the Parc de la Roseraie. This eight-hectare departmental park, classified as a historic monument, invites visitors to stroll beneath the foliage, between remarkable 19th-century trees and treasures of the past, such as the manor house of the Countess of Boigne and the remains of the Arouet house, a reference to Voltaire's family.