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4 months agoRich folks have had variations of these for a while, they called them “safe rooms”. I’ve installed security alarms and phone/Internet lines in places like that, as well as monitors that show feeds from the house cameras. It’s literally almost an entire house underneath the main house, ready for someone to seal themselves in and live in it for a couple months.
They have multiple purposes, like being a place to hide from an angry mob, or as a storm shelter. Some even have secret escape tunnels.