Conference/War Room The Conference/War Room is located near the Danger Room. It is the 'operating center' of the X-Men. This is where briefings are given, missions are planned, and meetings take place. There are various computers and monitors around the War Room, each with their own function. The War Room monitors news feeds from every news network on television and radio, and scans every known frequency for reports on events occurring around the world. Thanks to the artificially intelligent computer program Cerebro running throughout the mansion; the X-Men don't need to scan 24/7. If Cerebro picks up something, it will notify the X-Men through their communication links.
The Danger Room One of the Restricted Sub Level Rooms The Danger Room consists of two parts, the Danger Room itself, and the Control Room which is housed above the Danger Room. To the untrained eye, the Danger Room is a featureless room. To those who engage its systems, it is the ultimate battle simulator. It employs highly advanced technologies from sources such as the Shi'ar, Forge and Beast. The Danger Room pits its opponents against an array of physical and holographic opponents that tests a trainees' mastery over their mutant powers to peak endurance. Using the advanced technologies, the Danger Room can give the illusion of being many times bigger than it actually is. Anything from gravity, heat, humidity, or texture can be manipulated from the control booth. Students are not permitted to be in the Danger Room unless accompanied by an instructor or X-Man.
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The Holding Cells The holding cells are an underground storage facility for those villains that the X-Men deem too unsafe to let roam about freely. The holding cells consist of small titanium-steel cells with the same type of door. Various safety measures can be taken such as erecting an internal force field to back up the titanium-steel walls, a nullification field to 'switch off' mutant abilities, and various other precautions. There are also stasis tubes which hold inhabitants in a state of suspended animation until they are awakened.
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The Cerebro Chamber To most people, it's a big, round room. To those who actually know what it is, it is no less than amazing. The Cerebro chamber houses Cerebro, a mutant locating and telepathic ability amplifier. When a telepath uses Cerebro, their telepathic abilities are boosted to an incredible degree. It is usually used for scanning for new mutants, but it can be used for other purposes. A non-telepath can also use the Cerebro machine, although this is not recommended unless they are trained because they may experience various degrees of psychic trauma.
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Research & Development and Medical Labs These labs are usually used by the X-Men’s lead scientists and other medically-trained mansion staff. RALPH, the holographic doctor is also installed in the lower-level Medical Lab in the event that the physical doctors are unavailable.
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The Hangar Bay This is one of the very few places on the Estate that is actually as it seems. The Hangar Bay is just that, an underground area for the storage of the X-Men's aircraft, notably the Blackbird. There are two exit and entry, one is located at Devil's Rock, the other is located beneath the basketball court. A klaxon will sound to warn anyone nearby to evacuate the area. Students, faculty, and X-Men are advised to move immediately.