The Secret Laboratory was a secret area of The Initiative that wasn't even recorded on its layouts. Located behind Room 314, it was intended for the final stage of the 314 Project. It had a door that connected to the caves Adam initially took as his lair.
The lab was equipped with operating tables and gurneys as well as medical supplies for the creation of bio-mechanical demonoids.
The lab also had a monitoring room connected to all the security cameras of the Initiative.