Ridleygram of the Refinery

leading from

Ridleygrams

and 

Nostromo

Ridley Scott's sketch of the refinery , with towers perhaps loosely
inspired by the skyline of Oxford known as City of the Dreaming Spires.

(from Alien: The Archive, p82, upper background cleared up using 
Photoshop because the picture was printed overlaying another)

 



(source: http://university.which.co.uk/university-of-oxford-o33)