* Astronomy

'Biggest cave' is Calders Geo in Shetland at Esha Ness

The biggest cave in Britain can be found in Shetland, a geologist has claimed.
Jonathan Swale used a laser range-finder at the Calders Geo sea cave at Esha Ness.
He said he found it to be 60ft tall and spanning a floor area of 5,600 square metres.
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