Atacama Observatory Tours

ALMA’s public visits are suspended, and it is a radio telescope with nothing to look through anyway. ESO’s Paranal Observatory runs free tours on Saturdays, but in daytime and a long day’s drive from San Pedro. So the observatory tour you can book in San Pedro de Atacama is a night telescope tour, and the one that comes closest to an observatory setting is the aire libre Astro Tour with big telescopes, from $67 per person.

ALMA: suspended, and nothing to look through

ALMA, the radio observatory on the Chajnantor plateau, is the observatory most visitors to San Pedro have heard of. Its public tourist visits are suspended as of October 2026. ALMA says it is working to reopen but has given no date, and for now only educational and institutional groups visit on weekdays.

When the visits did run, they were free, on weekend mornings, booked online in advance, with a free bus from San Pedro. Visitors went to the Operations Support Facility at about 2,900 m (9,500 ft), never to the antennas on the 5,000 m plateau, and there were never night visits. ALMA also closes to visitors every February.

The bigger point for a stargazer is that ALMA is a radio telescope. Its antennas collect radio waves, so there is no eyepiece and nothing to look at the sky through, day or night.

Paranal and the ELT

ESO’s Paranal Observatory, home of the Very Large Telescope, runs free guided tours on Saturdays in daytime, with online registration that opens quarterly. It sits about 120 km south of Antofagasta, a long day’s drive from San Pedro each way, so it is not a day trip from here. You see the buildings and the telescopes by day; visitors don’t look through research instruments. The Extremely Large Telescope on Cerro Armazones is closed to the public while it is built.

Chile hosts around 40% of the world’s astronomical observing capacity, according to Chilean government figures, and almost none of it is open at night to visitors.

Professional and tourist observatories compared

The night tours set up their own telescopes at dark sites outside town. They are built for looking, not for research, and that is exactly what you want on a holiday.

What the telescopes on these tours show

The tours start with the naked eye, usually with a green laser pointer tracing constellations, then move to the telescopes. Depending on the season and the moon, you look at planets, double stars, star clusters, nebulae and galaxies. From San Pedro the Magellanic Clouds are best on evening tours from November to March, and the core of the Milky Way rides high from roughly April to September.

The moon matters more than the telescope. Moonlight washes out the Milky Way and faint galaxies, while the moon itself, planets, double stars and bright clusters still look good through an eyepiece. The next new moon is 10 October 2026. Our best time for stargazing guide lays out the moon and season month by month.

The aire libre Astro Tour

aire libre picks you up at your hotel and drives about 15 minutes to an outdoor observation area laid out in the shape of a Chakana, the Andean Cross, with a mirror of water in the center. The idea comes from Central Andean cultures, which watched the stars reflected in water. A certified guide explains both the Andean and the Greek and Roman reading of the constellations, then you move to high-end professional telescopes. A light-sensitive camera takes your picture with the stars, and there is hot tea, chocolate or red wine with a snack. You spend about two hours at the site, and there is a toilet. Guides speak English, German, French or Spanish.

It has 5.0 from 20 reviews on GetYourGuide. The $67 starting price is the semi-private option; when we checked in October 2026, the private option was around $141 per person for two adults. Our aire libre breakdown has the full details.

Other telescope-led tours

The Roofless Experience observes with two 16-inch telescopes and runs only when the moon is below 50% illumination, from $65 per person with 4.9 from 131 reviews.

Andestellar pairs a 12-inch telescope with a Unistellar smart telescope and a dedicated photographer, from $49 per person. See our Atacama stargazing photo tour guide for how its photos compare.

Atacama Dark Sky uses a smart telescope that captures nebulae and galaxies in color, and sends you the images the next day. It is a small-group night from $186 per person.

Observatory Licanatay combines modern and Andean astronomy with professional telescopes, from $31 per person, the lowest price of the tours we cover, with 4.7 from 782 reviews.

Independent observatories near town

A few observatories near San Pedro run their own night programs and are not bookable through this site. SPACE, run by astronomer Alain Maury, has large telescopes and meets in town, and Ahlarkapin, in the Coyo area, is described as Atacameño-run. Book those directly with the operator.

If you want a booking with free cancellation up to 24 hours before, check aire libre’s availability, or compare all nine tours on the homepage.