Valle de la Luna — Moon Valley — sits 15 kilometers west of San Pedro de Atacama in the Cordillera de la Sal. Wind and water have carved the salt-and-sandstone landscape into formations that look genuinely extraterrestrial: jagged ridges, deep canyons, and dunes of fine sand between walls of crystallized salt. NASA has used the area to test Mars rovers because the terrain and mineral composition are the closest analog to the Martian surface found on Earth.
What You See
Duna Mayor: A large sand dune that most tours climb for the sunset view. From the top, the Cordillera de la Sal stretches in every direction with the Andes and Licancabur volcano on the eastern horizon. The climb is short but steep in soft sand — 15 minutes up.
Las Tres Marias: Three rock pillars eroded into shapes that vaguely resemble human figures. A quick photo stop on most tours.
Anfiteatro: A natural amphitheater carved into a cliff face by wind erosion. The acoustics are remarkable — guides sometimes demonstrate by clapping or speaking quietly against the rock wall.
Coyote Canyon: A narrow slot canyon cut through layered salt and sediment. Walking through it, the walls close in and the light shifts — it is one of the most atmospheric spots in the valley. Some tours include this; others skip it for time.
Salt Caverns: Small caves in the salt formations with stalactite-like salt crystals hanging from the ceiling. Headlamps required (guides provide them).
Sunset vs Sunrise
The sunset tour is the most popular — the colors on the rock formations shift through orange, red, pink, and purple as the sun sets behind the western ridge. Nearly every agency in San Pedro offers this trip, departing around 4-5pm depending on season. The Duna Mayor viewpoint gets crowded at peak times.
Sunrise visits are quieter and the light is equally good, but fewer tours operate at this time. If you rent a bike or car, a sunrise visit means having the valley largely to yourself.
Practical Information
Entry fee: Approximately $5, paid at the park entrance. The area is managed by the local Atacameno community.
Getting there: Every tour agency in San Pedro offers Valle de la Luna tours ($15-25 per person including transport and guide). You can also drive independently (15 minutes from town, paved road) or cycle (1 hour, flat and manageable). Bike rental in San Pedro costs about $10-15 per day.
What to bring: Water, sunscreen, sunglasses. Temperatures drop fast after sunset — bring a warm layer. Closed shoes for walking on salt formations (sharp and uneven).
Time needed: Tours last 2-3 hours. If visiting independently, allow more time to explore the canyons at your own pace.
Best time: Late afternoon for sunset tours. The valley is photogenic at any time but the low-angle light transforms the colors. Avoid midday in summer when temperatures exceed 35°C and there is no shade.