Good late afternoon trip. 3000 pesos gets you a minibus trip around the area without having to pedal a bike, also costs 3000 for half day. Climb the sand dune and see sunset. Take fleece as it gets cold in that wind.
Valle de la luna is one of the excursions that you can go on from San Pedro. It is a beautiful valley and the tours usually go in the evening so that you can watch the sunset. It is incredibly beautiful, and the amount of different colors that appear at sunset is amazing. This picture was taken at the top of a sand dune that you can walk up.
The tour cost about 3000 pesos and in general all of the tours charge around the same.
In many parts of South America desert areas with bizarre rock formations are called "moon valley" and one could easily imagine that the surface of the moon could look quite similarly ....
My wife and I spent a few days in San Pedro Attacama and one of the highlights was our afternoon crossing the Valle de la Luna. Stunning.
A visit to the Valle de la Luna at sundown is a must, an amazing place. However, it is full of tourists.
A visit to the valley of the moon is usually done around sunset when people climb the sand dune to get the veiws from either side.