Photographer Sven Lützenkirchen's Werke series reveals a secret side to factory architecture. Each is a dry image of a sprawling industrial site in Germany but, rotated vertically and mirrored, the images start to take on new identities resembling towering robots, exotic totems, nuclear warheads or mechanical insects.
#10 Kalkwerk (lime plant), 20
#1 Steinkohle Bergwerk (coal pit), 2009
#6 Kieswerk (gravel pit), 2011
#11 Zementfabrik (cement works), 2013
#2 Rußfabrik (carbon black factory), 2011