Killifer's cloning facility was a cavern deep under Nadiem's surface that housed cloning chambers that were stolen from Kamino during the Clone Wars. Branching off from the cavern were numerous rooms and corridors made out of durasteel.
This underground compound was under Finn Killifer's command and was where he successfully grew the nine clones that made up Sharkey's clone squad. It was designed to grow an army of clones that Killifer would secretly insert into the Grand Army of the Republic.
After MI5 successfully infiltrated the facility, the self-destruct sequence was initiated by one of the clones. Jedi General Sharkey and most of the MI5 agents were able to make it out alive, but the facility was completely destroyed. Later, MI5 members were unable to salvage any useful information from the facility's databanks.