There is a vast and open area underneath the North Atlantis Ocean built of extremely powerful nanocarbon steel by Superboy in 2025. This served as a containment center for him incase he became evil. After it disbanded, however, it was furnished by a real estate company and put on the market as an exotically located mansion. However, the location was it's undoing, as it was extremely hard to find. When Maxwell Crock rebanded Young Justice, the mansion, extremely strong and durable, able to withstand a 1000 Megaton blast was developed into a living center for the Den Mother of Young Justice. Hidden deep underground, it is also extremely secretive. Jackson Reed recently became the owner of this place, however it is quite empty as he has not yet furnished.