Mark Zuckerberg’s reported $100 million compound in Hawaii comes with an underground bunker

Mark Zuckerberg and family are building an underground bunker.

Work is underway on the Hawaiian island of Kauai for a 1,400-acre complex for the Meta founder and CEO that will ultimately be one of the most expensive properties in the world, according to a recent report in Wired.

The property, known as Ko’olau Ranch, will ultimately cost over $270 million, the publication reports, and will include a 5,000-square-foot underground bunker. The property, on the island’s North Shore, is also said to have its own energy and food supplies.

Workers on the project are under strict nondisclosure agreements, and even the casual mention of the project on social media is grounds for dismissal. Wired, though, says it obtained plans for the compound and spoke with some workers, and reports the compound will have over a dozen buildings, with at least 30 bedrooms and 30 bathrooms. There will be two mansions, spanning 57,000 square feet, with elevators, offices, conference rooms and an industrial kitchen. Those will be joined by a tunnel, which branches off into the underground bunker, which has a living space and a mechanical room, as well as an escape hatch.

The compound, as described in the story, is Disney-esque, with hidden cameras everywhere and “blind doors” that will imitate the design of surrounding walls. In addition, there will be 11 treehouses, linked via treetop rope bridges, as well as a full-size gym with pools, a hot tub, a sauna, and a tennis court. A six-foot wall surrounds portions of the property to ensure privacy.

Zuckerberg has mentioned Ko’olau Ranch himself—most recently in an Instagram post two weeks ago, where he discussed plans to raise cattle on the land.

“Started raising cattle at Ko'olau Ranch on Kauai, and my goal is to create some of the highest quality beef in the world. The cattle are wagyu and angus, and they'll grow up eating macadamia meal and drinking beer that we grow and produce here on the ranch,” he wrote. “My daughters help plant the mac trees and take care of our different animals. We're still early in the journey and it's fun improving on it every season. Of all my projects, this is the most delicious.”

While some locals have criticized the construction, others note it has brought jobs to the island and that Zuckerberg and his wife Priscilla Chan are two of the island’s top benefactors, having given more than $20 million to nonprofits on Kauai since 2018.

This story was originally featured on Fortune.com