Giant cave hall discovered down sinkhole in Guangxi, China
Climbers found the 6.7-million-cubic-metre cave at the bottom of a massive sinkhole in China.
from BBC News - World https://ift.tt/2EyxlQd
from BBC News - World https://ift.tt/2EyxlQd
Giant cave hall discovered down sinkhole in Guangxi, China
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October 21, 2018
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