The house took three years to build and was completed in 2008.
The walls can be electronically sealed.
It can transform from sealed fortress to inviting home with just a few quick maneuvers.
"When it shrinks you can say it's ugly, it's a block," architect Robert Konieczny previously told Insider. "But when it opens, it becomes a friendly, nice, interesting building."
The bridge retracts into the surrounding concrete. For security purposes, the only available entrance to the house is the front door.
In the event of an apocalypse, residents will still be able to take a dip in the pool.
The interior was designed by Magdalena Radaloowicz-Zadrzyński. Who knew zombie-proof homes could look so good?
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