The Laundry Series/Nightmare Fuel


 * The actual Atrocity Archive (especially the chair and tables) is a prime example. Oddly enough, much of this trope seems to be provided by humans in the Laundry novels.
 * Dear God, the reconstructed Zuse Z-2! "[T]hey rebuilt it at Sobibor camp, using circuits soldered with gold extracted from the teeth of their victims."
 * Club Zero. Amsterdam.