The daring journey inside the world’s deepest cave - BBC REEL

The Veryovkina Cave is the deepest known cave on Earth. It took half a century and about 30 expeditions for Russian cave explorers to reach its record depth of 2,212 metres. Speleologists still think there is more to be discovered. Video by Irina Sedunova and underground footage by Petr Lyubimov To see more videos, please visit: #bbcreel #bbc #bbcnews