The terrain at the ALMA site

In the picture, a typical reddish rock formation along the road that goes up to the Chajnantor plateau, home of the Atacama Large Millimeter/submillimeter Array. Around and above the ALMA Operations Support Facility (OSF), located on the same road at 2900 m altitude, many grooves and gullies produced by the water flow, which was probably more abundant in the past, can be observed.