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One of Martyn's diving companions, Robbie Schmittner, in a huge flooded cave in Mexico. & A) n' `# G" M
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d. L& C m- S6 x. w公仔箱論壇Divers 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.
+ h, M1 B7 {+ g; dTVBNOW 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。' o% |( B: H, R) _1 a

* X# t7 n: l7 x0 j6 Y, B2 G* }公仔箱論壇Divers often use guide-lines to keep them on track in the murky depths. Getting lost can be fatal.
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. K+ e+ Q s) O2 S( f8 z+ h- M7 Y" B/ Ntvb now,tvbnow,bttvbDeep 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公仔箱論壇+ I7 V9 f' P) m; G7 X9 ]1 f R/ ~
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In another of Martyn's photos Helen Rider swims through the narrow confines of Taina Cave near Santo Domingo in the Dominican Republic. |