The largest radio telescope in the world
In the heart of the Atacama Desert is the Atacama Large Millimeter/submillimeter Array (ALMA), the largest and most powerful radio telescope in the world. Its 66 high-precision antennas allow international scientists to investigate the formation of stars, galaxies, and cosmic origins.
Through its guided tours, available upon prior registration, it is possible to tour the Operations Support Center and understand the magnitude of the engineering that makes this frontier science possible. It is a key opportunity to appreciate the technological deployment behind each discovery and understand why Chile has positioned itself as the world capital of astronomy.
Plan your trip to ALMA Observatory
How to get there
How to get there by air
The main airport in the area is El Loa Airport (CJC) in Calama, located 1 hour from San Pedro de Atacama. You can also land at Andrés Sabella International Airport (ANF) in Antofagasta, although the land transfer is longer (about 3.5 hours).
How to get there by land
Access is only via the official and free ALMA tour. Arriving in private vehicles is not allowed. You must register online (well in advance) for the visits, which are usually only on weekends. An ALMA bus picks up those registered in San Pedro de Atacama and takes them to the observatory (40 km).
Must-Know Tips
Visits to ALMA require prior registration on their website in advance, as places are limited. The observatory is located at high altitude and in a desert area, so it is essential to bring sun protection, a hat, and water. Follow all the safety regulations of the site.
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