A team of world-class kayakers takes on running a seemingly impossible river that disappears underground in the Mexican jungle in a deep gorge, and miraculously reappears after tumbling nearly a mile underground. Added to this are early descents of Agua Azul’s stunning huge waterfalls of bluish-white water. Kayakers: Americans Doug Ammons and Bob McDougall, South African Jerome Truran, and German Markus Schmid.(National Geographic, 1991).
DVD – 20 minutes