Extraordinary pictures of the 2,000 year old underground labyrinth where Jewish rebels hid from Roman soldiers
It is a long journey down into the dark - and back into the depths of history.
But it certainly isn't a trip for the claustrophobic. The ancient tunnels of Hirbet Madras near the Sea of Galilee, in Israel, are so tight that they are almost impassable in places.
It is a fascinating part of history which attracts visitors from across Israel. But it is virtually unknown to foreigners....