From H. H. Holmes' murder hotel to Madame LaLaurie's house of horrors, these nine lairs of notorious serial killers were the scene of some of the most brutal crimes in history.
Though the gruesome murders perpetrated by serial killers can send shivers down the spines of even the most hardened true crime fans, the horror is only worsened when those murders are preceded by terrifying acts of torture.
And even among this subset of killers who torment their victims to prolong their suffering, there are those especially sadistic predators who build their own torture chambers in order to inflict maximum pain on their helpless prey.
These are the nine most disturbing dungeons that serial killers used to torture their victims.
