Last December, a lengthy Wired investigation said Meta CEO and Facebook founder Mark Zuckerberg was in the process of building a 1,400-acre compound on the Hawaiian island of Kauai, which would include a underground shelter spanning over 5,000 square feet. That’s more than twice the size of the average private family home in the U.S.

Zuckerberg is in the process of constructing Koolau Ranch, a 1,400-acre compound that includes two mansions and a dozen buildings.

Mark Zuckerberg has broken his silence on rumors he's built a 5000-square-foot 'Doomsday bunker' underneath his sprawling $270,000,000 home. The Facebook CEO has a net worth of around $207.4 billion, according to Forbes, and a ginormous mansion (or two) on a remote island to prove it.

Mark Zuckerberg describes his bunker, part of his massive Hawaii property, as "just a little shelter." The compound contains 12 treehouses, two mansions, a 5,000-square-foot bunker and extreme security measures.

CEO of Facebook Mark Zuckerberg walks to lunch following a session at the Allen & Company Sun Valley Conference on July 08, 2021 in Sun Valley, Idaho.

Mark Zuckerberg denied rumours of a “Doomsday bunker” beneath his $270M Kauai estate, calling it a basic shelter like a basement. He emphasized the ranch’s focus on raising high-quality cattle, not building a survival hideaway.