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One of Martyn's diving companions, Robbie Schmittner, in a huge flooded cave in Mexico.
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! U4 V& r' L v7 W2 dDivers carry remote underwater flash guns to illuminate this image, taken in what is probably the world's biggest underwater tunnel, Weebubbie Cave beneath the remote Nullarbor Plain of western Australia.
0 |6 \0 l. G0 p5.39.217.77TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。) `% e1 N, M/ j) H4 J; {

- V5 |0 o# \' h) b* _5.39.217.77Divers often use guide-lines to keep them on track in the murky depths. Getting lost can be fatal.
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Deep and dark doesn't always mean cold: Jenny Pinder swims through the underwater passages of the Grotta Giusti Cave in Tuscany, Italy. where geothermal activity heats the water to an amazing 35 degrees centigrade
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. x4 s3 l2 Z5 o0 g0 xtvb now,tvbnow,bttvbIn another of Martyn's photos Helen Rider swims through the narrow confines of Taina Cave near Santo Domingo in the Dominican Republic. |