Natural World - Season 23 - Eps 12: Secrets of the Maya Underworld
Beneath the jungle-clad temples of Mexico's Yucatan, a startling discovery has been made: the largest network of flooded caves and underground rivers in the world. The intrepid cave divers exploring this surreal landscape have made remarkable discoveries: bizarre new animals, as well as the skeletons of the ancient Maya and the offerings they made to the spirits. This was their underworld, and its secrets are finally being revealed.
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 26 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)