On TV this week…
1. Mexico’s Cave of Crystals stunned geologists when it was first discovered in 2000. The underground chamber contains some of the largest natural crystals ever found – some of the selenite structures have grown to more than 10m long. Professor Iain Stewart got a rare glimpse of the subterranean spectacle while filming for the new BBC series How the Earth Made Us.
How The Earth Made Us: on Tuesday 19th January on BBC Two at 2100.
2. Iolo Williams goes underground to explore the landscapes within caves and old mines. With on-screen English subtitles.
Tir Cymru: Thursday 21st January on S4C at 2130.
Naica Cave will probably be on iplayer soon, while Tir Cymru can be seen here
http://www.s4c.co.uk/clic/e_level2.shtml?programme_id=339439503 ….click the owl for subtitles.
From about 9 minutes 45 its got some stuff about the chedder caves. though i found watching michal portillo frankly uncanny
http://www.bbc.co.uk/iplayer/episode/b00qbnd5/Great_British_Railway_Journeys_Yatton_to_Weston_Super_Mare/