As waters in a reservoir outside Peraleda de la Mata in Cáceres receded, a circle of megalithic standing stones emerged from the deep.
The stones, that date from the second and third millennium BC, form the site of a sun temple on the banks of the River Tagus and were last seen by locals six decades ago before the area was flooded during the Franco-era to create a reservoir.
The collection of 144 stones, some of which reach two meters high and have engravings of serpents, are arranged in circles, but like Stonehenge, it is unclear exactly who put them there and for what purpose.
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https://www.thelocal.es/20190822/drought-reveals-long-lost-spanish-stone-henge-in-cacares-reservoir