First seen in 1979's [ALIEN](https://www.imdb.com/title/tt0078748/), the derelict/crashed ship rises out of a low-contrast, monochromatic landscape, almost blending in with the (themselves asymmetric) rocks, and is an example of asymmetry but... for a purpose we don't know.
ALIEN Derelict
Which is fine, good, in fact - it's suppposed to feel ALIEN! The asymmetry does some, and then the "to what possible purpose" does more.
Later in the franchise - in [Prometheus](https://www.imdb.com/title/tt1446714/) - we get a piece of promotional concept art that really shows the ship at a good angle:
