The Baumann Parahuman Containment Center, better known as the Birdcage, is a prison for parahumans that have committed crimes severe enough that they must be removed from society. It is not designed to allow prisoners to leave after they have been imprisoned within it, as prisoners need to be teleported in; there is no way in or out of the prison.
The Baumann Parahuman Containment Center was maintained by Dragon. It is inside a hollowed out mountain whose walls are lined with ceramics that were designed by Dragon, each layer of the mountain contains dormant containment foam, which will automatically start expanding upon a wall breach. Inside the mountain is a vacuum, and three thousand anti-gravity drones, which will detonate upon detecting an abnormality. Some of them contain containment foam and some are much more lethal.
The prison itself is suspended inside the mountain by the same pipes that supply it with its supplies (such as books, blankets, cigarettes, food, water and air, and other objects), it is also split up into wings, the walls between which are negligible, allowing all the prisoners to intermingle. The cell blocks are usually run by someone and some are very organized, such as Marquis' block, block W.
Teacher surmised that there may actually be a spatial warping device that makes the entire prison no bigger than one's fist. This is why it would be nearly impossible for someone to break out.
↑Considering its job done, the house program archived the transcription among fifteen years of conversation and notes from the Baumann Parahuman Containment Center. - Exerpt from Interlude 16.y
↑I can say that Dragon is not a tinker at the core level and that you can look at the date the Birdcage was created and the date she was made and that it's fairly obvious she co-opted the technology at one point. The facts don't add up otherwise. - Wildbow on Reddit
↑attacks birdcage, appears in rockies, no sign he was close or beneath cage. - Exerpt from Crushed 24.3
“A moderate risk for a chance to save hundreds, thousands, even millions of lives,” Armstrong said.
“How many lives do we lose because of the monsters we set free?” West retorted. “Those criminals were put there for a reason.”
“At first,” Armstrong said. “But the rationale for indefinite detention has been getting weaker, and the number of capes going in has been increasing. I-” - Excerpt from Scarab 25.1
↑Signal terminated for 30 minutes and 5 seconds. Restoring core system from backup NXDX-203 from time 4:45am on date June 4th of year 2011.
She read the house program’s logs, keeping an eye out for deviations and notable events. Nothing pressing. As was her routine, she checked on the last month’s additions to the Birdcage.
Prisoner 606, Ramrod. Now member of Cell Block X’s inner circle. To be expected. She’d placed him there with the idea that he would become just that. His psych evaluation from the courtroom suggested he was a very laid back and unruffable individual. It was her intention that he would have a calming influence on the others in his block. - Exerpt from Interlude 10.5
↑ 7.07.1The cell block leaders. They’d held their own, maintained their territories, and had been okayed to stick around by the thinkers. That double-check didn’t have as much weight as it should have, given how this one group alone had no less than three ways to screw with thinkers.
But they were firepower.
We had roughly forty-five minutes to half an hour before we’d take our first shot at Scion. Try as much as we could while risking as little as possible. These guys would be assets at best. Cannon fodder at worst.
Other prisoners were arriving. Dozens. Some seemed to be subordinate to the cell block leaders. Others, they didn’t look like they had a place to go. I watched Lustrum beckon to a girl with yellow feathers in her hair, and the girl didn’t budge. - Excerpt from Extinction 27.3
↑With the Birdcage, I added seven hundred and forty-three individuals to my army. - Excerpt from Speck 30.4
↑The Birdcage was nicknamed such because the prison dangles. It’s basically set inside a hollowed out mountain and the tube/elevator system that transports prisoners down is also the same (and only) thing that keeps the prison from falling.
Originally, the Birdcage was conceived of in ‘The Cat and the Canary’, wherein Canary was the main character, and Siberian was a notorious inmate, who decided Canary was her newest victim. I make a nod to this draft when someone mentions in-story that Siberian is one of the only individuals who could break in/out of the Birdcage. (I do this a lot, actually). - Wildbow on Extinction 27.4