Damien and Francois embark on a speleology expedition to discover the hidden secrets directly under our feet in the secret underground world of caves. Subscribe to see more full documentaries every week: https://bit.ly/2lneXNy TRACKS publishes unique, unexpected and untold stories from across the world every week. From "Uncharted Canada" Facebook: https://www.facebook.com/TRACKSTravelChannel/ Content licensed from Hewitt Media to Little Dot Studios. Any queries, please contact us at: owned-enquiries@littledotstudios.com