I den här påkostade filmen får vi följa med in i världens största grotta. Den över åtta kilometer långa Hang Son Doong-grottan i Vietnam har sin egen regnskog och ingången är så stor att den skulle kunna rymma ett kvarter med 40-våningshus.
• Klicka här för fler sevärda naturfilmer här.
Chefredaktör och grundare. Stötta Natursidan – ge bidrag via bankgiro (5114-2529) eller Swish (0730-385 185). Tack! Naturligtvis betalas det skatt på dessa gåvor.
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Påkostad naturfilm: Följ med till världens störs… http://t.co/JSJSPUpupC