ZDF Enterprises

Only 5% of the world’s caves have ever been explored; no-one really knows what lives in this impenetrable “world within a world”.

Now, for the first time, science has the technology to reveal this darkest of domains. Our expedition team will use a revolutionary laser scanning technique inside the caves to reconstruct breathtaking new worlds and produce never-seen-before stunning fly-thru animations.

In each episode they enter uncharted territory: caverns so vast they could house the great pyramids of Giza, caves with lush forests and their own weather systems, hidden chambers concealing ancient human remains, and mysterious new subterranean creatures.

These visually spectacular habitats will transform our understanding of climate change, world history and conservation and strengthen the human connection to this secret underground world.