What is 'Majlis al Jinn', situated on the Selma Plateau in the Eastern Hajar Mountains?

Answer and explanation

Correct answer: D. One of the world's largest underground cave chambers by surface area

  1. Step 1: Majlis al Jinn ('Meeting Place of the Spirits') is the second largest known cave chamber by surface area in the world.
  2. Step 2: The floor area measures approximately 58,000 square meters with a ceiling height of 120-150 meters, accessible only by vertical abseiling through small roof openings.
Answer
One of the world's largest underground cave chambers by surface area.
Why not the others: 'An ancient open-air desert meeting pavilion for tribal chiefs' is a literal translation of the name, but incorrect; 'A modern astronomical observatory telescope complex' confuses a dark cave with an observatory; 'A fortified hilltop citadel overlooking Sur' describes a castle.

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