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Mysterious monolith appears — and vanishes — in 3rd location

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Sunday TODAY’s Willie Geist runs through the Highs and Lows of the week, including a mysterious monolith discovered by a hiker in California after similar metal structures were recently spotted in two other locations. Also this week, a 62-year-old man was spotted by a cargo ship clinging to his sinking boat, a couple had to resort to a Rapunzel-style quarantine wedding using a decorated ribbon from a second-floor window and a koala in Australia found its way onto a family’s Christmas tree inside their home.