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The Rub' al Khali, or the Empty Quarter, is a desert in the Middle East.


The location contained the ruins of Ubar, an ancient city that predates human civilization by at least 4,000 years.[1][2][3] Lorenzo Cabot traveled here to find the city in 1894, and what he discovered caused his hired hands to flee.[4]


The Rub' al Khali is mentioned only in Fallout 4.

Behind the scenes

The Rub' al Khali is a real world desert, encompassing most of the southern third of the Arabian Peninsula.


  1. Sole Survivor: "That's really interesting."
    Jack Cabot: "I'm glad to hear you say that. It's become my life's work. My approach is to combine a rigorous scientific method while keeping an absolutely open mind. So much has been closed off to us simply because people assumed they already knew the answers. My father excavated a city in the Rub'al Khali in Arabia which he dated to more than 4,000 years before the rise of any known human civilization. The structures and artifacts were... strange. Disturbing, even. Clearly not constructed for or by humans. I've spent my life trying to decipher what he uncovered."
    (Jack Cabot's dialogue)
  2. The Sole Survivor: "You said your father found a lost city?"
    Jack Cabot: "Yes. He spent years looking, and was widely ridiculed by the so-called experts. I'm ashamed to say even I doubted him. But in the end he found it: a lost city, buried in the sands of the Rub'al Khali, the Empty Quarter of Arabia. Millennia older than the earliest human civilizations. But with technology that seems to have surpassed our own. And yet, everything about it is... strange. Disturbing geometries, tools not made for human hands, carvings that hint at dimensions beyond our own..."
    (Jack Cabot's dialogue)
  3. Cabot House terminal entries; terminal, 05/07/2115
  4. Lorenzo Cabot's journal