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Photo: Imam Khairul Annas, CC BY-SA 4.0 via Wikimedia Commons
Consists of 50 groups of erected stone columns and a number of stone pillars carved from sandstone. It is unclear when they were erected but some historians believe they belong to a temple built in the fourth millennium BC.
The Columns of Rajajil is an archaeological site of sandstone pillars in the Al Jawf Region of Saudi Arabia, dated to the Chalcolithic period approximately 6,000 years ago. Sometimes popularly described as "the Stonehenge of Saudi Arabia," the site comprises 54 groups of trimmed stone pillars, each group containing between two and 19 pillars, distributed across a wide sandy plain in the Qara suburb southeast of Sakakah. Some columns reach over three metres in height and bear Thamudic inscriptions.
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Fortress dating back to the first millennium AD.