The largest radio telescope in the world
The Atacama Large Millimeter/submillimeter Array (ALMA) is the most powerful radio telescope in the world. With 66 high-precision antennas, it has generated images even sharper than those from the Hubble Space Telescope.
This colossus is located on the Chajnantor plateau, one of the driest and highest places on Earth. From there, it obtains unique records of star formation, molecular clouds, and the early Universe; in order to fulfill its main objective: to discover the origins of the cosmos.
Public visits are suspended and work is being done for their reactivation.
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 4 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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