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This image shows water spiralling down a huge hole. But this definitely isn’t a gateway to another world. In reality, it’s simply a giant drain called a spillway to divert excess water.
Lake Berryessa in California, USA, can hold around 521 billion gallons of water – any more than that, and the excess begins to be drained off through the spillway. This year, for the first time in a decade, it rained so much in January and February that the lake reached capacity. Now the 72ft-wide hole is funnelling the extra water away to prevent flooding.
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