The old Abandoned Warehouse (also known as Yokai's Warehouse) was where Robert Callaghan hid out after faking his death. The warehouse was a makeshift factory for Callaghan to mass-produce more Microbots for his plan. It is also the place where Hiro and Baymax first encounter Yokai. The second time the two came to the building, so they could take on Yokai; however, Yokai had vacated the warehouse after being discovered by the two earler, so the warehouse was abandoned yet again when Hiro comes back later.