Cave diving - often described as the "most dangerous sport on earth". These talks are lively and entertaining and take a look at all the popular cave diving destinations around the world, including the Lot- Dordogne, Florida, Mexico, Mallorca, Brazil, China, Borneo, Russia and Australia. Martyn gives a wide ranging overview of the subject, charting its history and development, the discoveries, the record achievements ...and the tragedies. Take an inside look at this widely misunderstood subject and come away with images and tales of unbelievable wonder.These are no dry and crusty lectures; rather Martyn's enthusiastic delivery provides a wonderous insight to the last great frontier on earth.... a rivetting experience, a double-bill of presentations you'll not forget.