Natural World - Season 18 - Eps 3: Elephants of the Sand River
Beneath the forested flanks of an extinct volcano lies a cave with a mysterious secret. Kitum Cave on the slopes of Mt Elgon in Kenya is the only place on earth where elephants venture deep underground. They are forced to make the dangerous journey into the cave because of their craving for salt. Humans have been drawn to Kitum Cave for thousands of years, originally to harvest salt, but more recently to slaughter elephants, leading to local rangers Daniel and Mike being assigned to protect the survivors
About Natural World

Title: Natural World
First Air Date: 1983-10-30
Last Air Date: 2020-03-20
Status: Returning Series
Rating: 7.1/10 (from 25 votes)
Language: EN
Seasons: 40
Total Episodes: 543
Network: BBC Two
Genres: Documentary
Production Companies: BBC Studios, BBC Studios Natural History Unit, BBC
Synopsis
Natural World is a nature documentary television series broadcast annually on BBC Two and regarded by the BBC as its flagship natural history brand. It is currently the longest-running series in its genre on British television, with more than 400 episodes broadcast since its inception in 1983. Natural World is produced by the BBC Natural History Unit in Bristol, but individual programmes can be in-house productions, collaborative productions with other broadcasters or films made and distributed by independent production companies and purchased by the BBC. Natural World programmes are often broadcast as PBS Nature episodes in the USA. Since 2008, most Natural World programmes have been shot and broadcast in high definition.
Cast

David Attenborough
Self - Host

John Hannah
Narrator (voice)

Juliet Stevenson
Narrator (voice)