A few nautical miles from Toulon, the island of Levant in the Var department holds a secret older than seven decades. On its 950 hectares, only a minimal portion is freely accessible, while the rest belongs to the army and has been closed to the public since 1948. No one, including the mayor of the commune, has been allowed to set foot on this secluded area of 900 hectares, which is used by the DGA Missiles Testing for missile tests. This isolation has allowed the Mediterranean maquis — a dense, shrub-covered landscape — to develop without human interference or urbanization, creating a sanctuary of biodiversity. Just a few meters from this military zone is Héliopolis, one of the oldest naturist villages in Europe, founded in the 1930s. The history of missile testing on the island begins on the beach of Pampelonne in Ramatuelle, where the first missile launch tests took place in 1948 under the watchful eye of the French Navy. Due to proximity to swimmers, the military sought a more isolated site and chose the island of Levant. In October 1950, a rudimentary launch station was installed on the island, giving rise to the CERES, the Center for Testing and Research of Special Missiles. Between 1956 and 1968, more than a hundred missiles were launched from the island, including those named Monica, Daniel, Antarès, Bélier, Agate, Centaure, Bérénice, and LEX. These rocket probes transformed the island into an open-air laboratory. In 1968, the CERES merged with other structures to form the Mediterranean Testing Center, which today is the Mediterranean site of the DGA Missiles Testing. More than a hundred engineers still work there today, from Monday to Thursday, to design the future missile launch systems of France. The military area represents approximately 949.84 hectares, or nearly 94.8% of the total area of the island. Access is made exclusively via the military port of Hyères, under the strict supervision of the Armament Gendarmerie, requiring professional badges or identity cards and systematic checks. The result of this forced isolation is a dense Mediterranean maquis, where Aleppo pines, arborous shrubs, and green oaks have developed without being trampled, cut, or disturbed. This vegetation could have given way to hiking trails and tourist constructions, but here it has continued to grow in almost absolute tranquility. Ten minutes away, naturists at Héliopolis tan without giving it a second thought. The contrast between the ultra-secure military area and the naturist village is striking. The militarized area applies the charter of the Port-Cros National Park as an affiliated area, though it does not belong to the core of the park. The incompatibility between firing activities and public access is evident, but the ecological result is remarkable. By prohibiting any human presence for nearly 80 years, the military has created a true sanctuary of preserved biodiversity. Little urbanization, no trails eroded by thousands of steps, and little light pollution from mass tourism have allowed the maquis to flourish in conditions few natural areas on the Mediterranean coast can claim today. The irony is that the same missiles that symbolize destructive power have, through an unintended collateral effect, offered nature a sanctuary that environmental protection alone might never have been able to guarantee with such consistency.