The Cauldron is a fictional location featured in comic books published by DC Comics. It is associated with the Batman line of comics and first appeared in Detective Comics #934 in August, 2016.
The Cauldron was a run-down boarded up tenement building located somewhere in Gotham City. A group of criminals used it as a base for their human trafficking operations. They received in a shipment of children from the Philippines, which they intended on re-selling to interested buyers in Hub City. Before the criminals could load the children up into a vehicle, they were interrupted by the arrival of Cassandra Cain, aka Orphan, who easily and brutally dispatched them.