Saw this on google news, surprised their wasn't a thread.
It's thought to be about 7,000 years old.
Drought exposes long-submerged 'Spanish Stonehenge' monument - Water levels in a man-made lake dropped significantly this summer after record heat and dry conditions. - By Denise Chow - Sept. 29, 2019, 4:30 AM EDT
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The circle of more than 100 large rocks, known as the Dolmen of Guadalperal, was submerged in 1963 after the Spanish government constructed the Valdecañas Reservoir to feed a hydroelectric dam that still generates power in the region. Occasionally, the tips of the tallest standing stones have been visible as the reservoir’s water levels have changed, but according to NASA, this is the first time that the entire monument has been out of water since the area was flooded to create the lake.
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Drought Has Revealed Spain’s Long-Submerged ‘Stonehenge’ Up close with the 7,000-year-old Dolmen of Guadalperal. By Alyssa McMurtry September 6, 2019
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The water level of the Valdecañas Reservoir in the province of Cáceres has dropped so low that it is providing an extraordinary glimpse into the past.
“I had seen parts of it peeking out from the water before, but this is the first time I’ve seen it in full. It’s spectacular because you can appreciate the entire complex for the first time in decades.”
Archaeologists believe the dolmen was likely erected on the banks of the Tagus River in the fifth millennium BC, as a completely enclosed space, like a stone house with a massive cap stone on top. And though it had been known, perhaps even damaged, by the Romans, it had faded beyond memory until German archaeologist Hugo Obermaier led an excavation of the site in the mid-1920s. Obermaier’s work wasn’t published until 1960, but by then the tide of the 20th century was on its way to the ancient site.
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Water stains and aquatic plants attest that the dolmen was recently submerged.
The Dolmen de Guadalperal was excavated and studied in the 1920s, drowned in the 1960s, and dry again in 2019
Two pictures taken from NASA's Landsat satellite in 2013 and earlier this year show just how severe the drought changes are.
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