Summary: Some alien planets are less than appealing to humans.
What passes for architecture on some alien worlds can be rather jarring to human senses, and never more so than here. The buildings look like mounds of dry mud stacked one atop another, roughly dome-shaped and in varying shades of greyish or greenish brown.
The windows and doorways are circular and apparently placed at random. A lot of them seem to serve double duty. There are no glass panes or actual doors, just the holes, open to the elements, and when the wind blows it plays the buildings like an out of tune musical instrument.