i saw this pic and it said it was from a national geographic magazine but i couldn't find it anywhere
please help
http://epod.usra.edu/.a/6a0105371bb32c97…
please help
http://epod.usra.edu/.a/6a0105371bb32c97…
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It is from the current Dec issue 'conquering a cave'
it is Hang Son Doong (Mountain River Cave) in Vietnam
it is Hang Son Doong (Mountain River Cave) in Vietnam