Fascinating series examining the wonders that lie hidden below our feet!

Journey through subterranean worlds and be surprised at the awe-inspiring stories of a world invisible from above… until now.

Join intrepid cave divers charting the beautiful Mayan underworld hidden beneath the forest floor; scientists exploring an underground lake that has been sealed by ice for 4 million years; visit deep caves that are home to a million bats; and others that provide life-saving salts to herds of visiting elephants, caves that were excavated to create human settlements 18-storeys deep and most magically, the vast Naiva caves in Mexico which are full of sparkling, fairy tale crystal.

But perhaps the most astonishing and mysterious sights of all are the cave paintings of Attamira, profoundly moving artworks created in deep, inaccessible locations by humans who lived 90,000 years ago.

Release Date‚ 5th Nov 2018