Racetrack, California, USA
Who wouldn’t expect a few oddities in a place like California’s aptly named Death Valley? Prime among them is the mystery of the ‘racing’ stones in the valley’s remote north. These large, flat stones, some of which weigh as much as 180kg, have ‘raced’ across the earth, leaving grooves in the dry, cracked lake bed behind them. Nobody has actually ever seen any of the rocks move, and science’s best guess is they’ve been blown across at times when the lake bed is slippery from rain or frost.
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