Written, produced and directed by Carl Ginsburg and Helen Demeranville
Cave diving is among the most challenging and dangerous sports - and cave diving
in the underground rivers of the Yucatan can be treacherous. Hundreds of miles
of uncharted corridors and extraordinary caverns have lured the world's great
divers to brave the perils of labyrinthine passageways, where even the most
experienced divers can lose their way.
RIVERS INTO THE UNKNOWN follows fearless and renowned diver Mike Madden deep
into the abyss, through stunning azure blue underwater grottos and breathtaking
caverns. Madden is a legend among fellow divers, environmentalists, and the
local descendents of the Mayans. Even after a decade of exploration, he is just
starting to comprehend the enormity of this underwater cave system, which for
thousands of years remained hidden and unknown.
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