SEST at La Silla from a distance

The 15-metre Swedish-ESO Submillimeter Telescope (SEST) at ESO's La Silla observing site in the southern part of the Atacama desert of Chile. Designed to observe at sub-millimetric wavelengths, SEST was built in 1987 on La Silla and decommissioned in 2003. 2,400 metres above sea level, La Silla was ESO's first observing site. Currently ESO operates the ESO 3.6-metre telescope and the 3.58-metre New Technology Telescope (NTT) at La Silla. This site also hosts many national telescopes, including the Swiss 1.2-metre Leonhard Euler Telescope and the Danish 1.54-metre telescope.