Arica and Parinacota Quebradas

In the Arica and Parinacota region of Chile, there are multiple "quebradas", or canyons/ravines/valleys or something like that. These things are huge, and an interesting thing about them is they're located in the Atacama Desert area. Also, they seem much more straight than other canyons and such, so from the rim, it might seem like an enormous ditch made of sand, but perhaps with some patches of green at the bottom. It could look really neat in person.