Egyptian pyramids

What is behind the door?

The Great Pyramid stands today as the last of the seven wonders of the ancient world and the largest man-made structure on the planet. Yet, everything about it is shrouded in mystery. 
Did the ancient Egyptians discover the secrets of complex mathematics and the construction arts? If the Pyramids are the burial tombs of the Pharaohs, why has no mummy ever been found in any pyramid? And what about the ancient fungus or curse that killed scientists? 
What's behind the secret door found in the Great Pyramid? And why hasn't it been opened completly a full decade after its discovery? Could there be a secret chamber behind the door containing a storehouse of knowledge from ancient times... or even from another world? 
The answers are in this amazing film!