Rumor has it that back in 2014, Mark Zuckerberg began work on Ko’olau Ranch, a sprawling 2,300-acre compound on the Hawaiian island of Kauai. When completed, it would be kitted out with a shelter, complete with its own energy and food supplies (though the carpenters and electricians working on the site were banned from talking about it by nondisclosure agreements). A six-foot wall blocked the project from view on a nearby road.
This is not your run-of-the-mill home improvement project.
When asked if he was building a doomsday bunker, the Facebook mogul answered with a definitive no. The property’s 5,000-square-foot underground space, he said, is “just like a little shelter, it’s like a basement.” But then there’s also Zuckerberg’s decision to buy 11 properties in the same neighborhood of Palo Alto, California, which together make up a 7,000-square-foot underground space beneath.

