Calar Alto Observatory

The Calar Alto Observatory (Centro Astronómico Hispano-Alemán or Deutsch-Spanisches Astronomisches Zentrum, respectively "German-Spanish Astronomical Centre" and "Spanish-German Astronomical Centre") is an astronomical observatory owned and operated jointly by the Max-Planck-Institut für Astronomie (Max-Planck Institute for Astronomy) in Heidelberg, Germany, and the Instituto de Astrofísica de Andalucía (Institute of Astrophysics of Andalusia) in Granada, Spain. It is located in Almería province in Spain on Calar Alto, a 2,168-meter (7,113 ft) high mountain in Sierra de Los Filabres.