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A long-lost ancient megalithic structure has been revealed, after intense droughts and record-breaking temperatures this summer lowered water levels at a Spanish reservoir.

Known as ‘Spain’s Stonehenge,’ the Dolmen of Guadalperal stone monument was erected 4,000 to 7,000 years ago on the shores of the Tagus river in west-central Spain. It was discovered in the 1920s but disappeared underwater in the 1960s, after the government built the Valdecañas reservoir, which flooded much of the surrounding area.

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For decades, only the tips of the ancient structure could be glimpsed from above.“All my life, people had told me about the dolmen,” Angelo Castaño, president of the local Roots of Peraleda Cultural Association,told Atlas Obscura’s Alyssa McMurtry.

“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,” he added.