Hidden Worlds 3D - Caves of the Dead(2013)

Original title: Verborgene Welten - Die Höhlen der Toten

In the days of the Mayas, cenotes – deep, natural pits on the Yucatan peninsula - provided the only means of obtaining drinking water. But in the mythology of this advanced civilisation, these waterholes and caves were also the entrance to Xibalba – the underworld.