Atacama Desert

The Atacama Desert has weather stations at certain interior plateaus that have never recorded rain. Not less than average rain; literally zero. It is the driest non-polar desert on earth, spanning over 1,000 kilometres of northern Chile between the Andes and the Pacific. The aridity that makes it hostile is the same quality that makes it one of the best places on earth to look at the sky, which is why some of the world’s most powerful radio telescope arrays sit on its plateaus at 5,000 metres.

San Pedro de Atacama

The base for most visits is San Pedro de Atacama, a small town at 2,400 metres in a fertile oasis surrounded by the desert. Most tour operators, hostels, and restaurants are here. It looks like a picturesque desert village and largely functions as an adventure tourism hub; expect it to be tourist-oriented and price accordingly. The surrounding landscape is the reason you came.

El Tatio Geysers

The world’s highest geyser field sits at over 4,300 metres, about 90 kilometres north of San Pedro. Tour groups depart at 3 or 4am to arrive at dawn when the steam columns from some 80 active geysers are most dramatic against the cold air. By 10am the show is largely over as temperatures rise. This excursion requires acclimatisation first; arriving in San Pedro and immediately booking a 4am high-altitude geyser trip is the decision most likely to end in altitude sickness. Spend your first day at the lower altitude before ascending.

Valle de la Luna

Valle de la Luna (Moon Valley) is 15 kilometres west of San Pedro: salt flats, cinder cones, and rock formations shaped by millions of years of wind erosion. Sunset is the peak visiting time and the light on the salt formations is extraordinary. It is also the most crowded time. Dawn is less well-known but better for photography, when mist lies in the valley floor and the colours are cooler and stranger.

Stargazing

Over 300 clear nights per year, extreme altitude, near-zero humidity, and virtually no light pollution make the Atacama one of the best places on earth to observe the night sky. The Milky Way is visible to the naked eye on any clear night from anywhere in the valley. Most San Pedro operators run two-and-a-half-hour guided tours from around 7:45pm using large telescopes (typically 14 to 16-inch instruments), covering constellations, nebulae, and planets. Cost around USD 40 to 60. Book a night with a new moon for the clearest dark sky.

ALMA, the Atacama Large Millimeter Array at 5,000 metres on the Chajnantor Plateau, is a more serious astronomical visit: one of the world’s most powerful radio telescope facilities. Tours are available on certain Saturdays and require advance booking; capacity is limited and they fill quickly.

Flamingo Lagoons

The salt lagoons south of San Pedro hold populations of Andean, Chilean, and James’s flamingos that feed on the algae growing in the mineral-rich water. Laguna Cejar is so saline you float at the surface without effort, a similar effect to the Dead Sea. The water temperature is cold even in summer. Tour packages typically combine the lagoon circuit in an afternoon.

Eating

Kilajá Restaurant in San Pedro does genuine regional cooking: llama steak, empanadas, quinoa dishes, local vegetables. The food is good and the prices are fair for a tourist town. Casa Atacama is another solid option for local ingredients done simply. San Pedro is not a great food destination; eat well enough here and save the serious restaurant budget for Santiago or Buenos Aires.

Staying

Explora Atacama is the luxury option, an all-inclusive resort with expert guides and its own excursion program. At the other end, basic guesthouses in San Pedro are cheap and clean. Hotel Altiplanico is a practical mid-range choice with easy access to town.

Practical Notes

Temperature swings are extreme: warm days and near-freezing nights are standard. Pack layers and a windproof jacket. SPF 50 sunscreen is a minimum; the UV intensity at 2,400 metres is higher than most people account for. April through October is the dry season; the wet season from November through March brings occasional afternoon thunderstorms that can close high-altitude roads.