Spain’s state Museum of Aeronautics and Astronautics at Cuatro Vientos preserves the country’s aviation and astronautics heritage for the Ministry of Defense. Its outdoor display and hangars hold aircraft and related collections including engines, uniforms, decorations, navigation equipment, models, satellites and other artifacts. Standout holdings include the Vilanova-Acedo, the oldest surviving aircraft in Spain, the Jesús del Gran Poder transatlantic aircraft, a Heinkel He 111 E-1 and a Juan de la Cierva C-19 autogyro, alongside historic civil and military aircraft. The museum’s conservation and interpretation mission is rooted in the Cuatro Vientos air-base setting; consult the operator for current visitor arrangements and any access restrictions. Address: Autovía A-5 km 10.700, 28024 Madrid, Spain.