Revealed: The mysterious ice cave with 25ft-long icicles that only freezes over in the SUMMER
Ice is normally associated with winter - but not so for this puzzling geographic anomaly.
The Coudersport Ice Mine in Pennsylvania has been baffling visitors for years with its ability to only ever produce ice in the summer.
At the bottom of the 40ft deep chasm lies a layer of ice and from the sides of the pit hang icicles as long as 25ft long and 3ft thick... but come the colder months it all melts away into nothing.
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