Cerro Armazones

Cerro Armazones is a mountain located in the Sierra Vicuña Mackenna of the Chilean Coast Range, approximately south-east of Antofagasta in the Antofagasta Region, Chile. Before construction started on the European Extremely Large Telescope, the summit was a horizontal control point with an elevation of . The new elevation is .
It is located in a privileged zone for optical astronomy because it has 89% cloudless nights a year. It currently hosts the Hexapod-Telescope and other telescopes at the Cerro Armazones Observatory.
On 26 April 2010, the European Southern Observatory Council selected Cerro Armazones as the site for the planned Extremely Large Telescope, and construction began in June 2014.