Luberon
The Luberon ( or ; Provençal: "Leberon" or "Leberoun" ) is a massif in central Provence in Southern France, part of the French Prealps. It has a maximum elevation of and an area of about . It is composed of three mountain ranges (from west to east): Lesser Luberon ("Petit Luberon"), Greater Luberon ("Grand Luberon") and Eastern Luberon ("Luberon oriental"). The valleys north and south of them contain a number of towns and villages as well as agricultural land; the northern part is marked by the Calavon, while the southern part is characterised by the Durance. The Luberon is often advertised under the  name Lubéron (with an acute accent on top of the "e"); some dictionaries justify that the two spellings are interchangeable. The total number of inhabitants varies greatly between winter and summer, due to a massive influx of tourists during the warm season. It is a favourite destination for French high society and British and American visitors because of the pleasant and picturesque towns and villages, comfortable way of life, agricultural wealth, historical and cultural associations, as well as hiking trails. Samuel Beckett notably lived in Cave Bonelly, a vineyard near to Roussillon, during World War II. In the last two  decades the Luberon has become known in the English-speaking world especially through a series of books by British author Peter Mayle chronicling his life as an expatriate settled in the Luberon village of Ménerbes. These are titled "A Year in Provence", "Toujours Provence" and "Encore Provence". Another of Mayle's books, a novel set in the Luberon, was made into a film called "A Good Year" (2006) directed by Ridley Scott, starring Russell Crowe and filmed in the region. Flora and fauna. Luberon is particularly rich in biological diversity. There are known to be around 1,500 species of plants , accounting for 30% of the flora and fauna in France, 17,000 species and sub-species of insects with almost 2,300 species of Lepidoptera, or nearly 40% of species living in France, 341 species and subspecies of vertebrate wildlife, 135 species of birds and 21 species of bats or 70% of species present in France. Among the 1,500 different species of plants, there are 700 species and sub-species of higher plants and 200 species of lichens. Rich fossil deposits are also preserved here, documenting for example ancient species related to songbirds, as well as an ancestral pelican. Nuclear facilities. The  Force de frappe or French strategic nuclear arsenal used to be located on the Plateau d'Albion before being dismantled in the late 1980s. Now, the underground site where the missile controls were located is a public multidisciplinary laboratory of the University of Nice Sophia Antipolis, the Low Noise Underground Laboratory (LSBB) of Rustrel, Pays d'Apt.