A former hunting ground for the Kings of France, the Bois de Boulogne has become the largest spot for relaxation in the west of Paris. With a surface area of 850 hectares, one of the 'lungs' of the capital encompasses the Parc de Bagatelle, the Jardin des Serres d'Auteuil, the Pré-Catelan and the Jardin d'Acclimatation. It offers numerous walkways, 28 km of bridleways and 15 km of touristic cycle routes. There are numerous facilities, which have been designed to suit everyone, such as playgrounds for children, the Musée en Herbe, picnic areas, bicycle hire and boat hire on the Lac Inférieur, the Auteuil and Longchamp racecourses, restaurants and the Théâtre de Verdure.