Our only stop in Chile was San Pedro de Atacama. As the name indicates the city is located in the Atacama desert, one of the driest places on earth. Average yearly rainfall is about 5 mm (for comparison: Berlin 500 mm, New York 1200 mm). But when we were there it was raining. Unbelievable. I didn't expect to go to a desert and then it rains.
We stayed for almost two days, walked around town (but there was not much to see) and took a tour to la valle de la luna (moon valley). San Pedro is a small town but the many adobe houses are quite nice and there are many small restaurants and cafes. Unfortunately it's a very expensive place. Especially coming from Bolivia, the prices for hostel and food in San Pedro where very high.
With an organized tour we went to the valle de la luna. No trees, no shrubs, no animals (at least not visible). It's a very dry but beautiful landscape. And apparently it looks like on the moon. We walked through some small canyons and caves and climbed over rocks. We watched the sunset over the valley before going back to town. After a delicious dinner it was time to catch the overnight bus north to the Peruvian border.