
`+ P! ~$ m& qtvb now,tvbnow,bttvbOne of Martyn's diving companions, Robbie Schmittner, in a huge flooded cave in Mexico. 1 H/ Y7 O2 l) a6 J
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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.
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Divers often use guide-lines to keep them on track in the murky depths. Getting lost can be fatal.: B0 r9 t% K1 e8 J( {; R, f( B
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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 centigrade2 k" N' j% b" E, e
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TVBNOW 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。: K& t; ^ K7 f/ r1 ]0 |% s' K
In another of Martyn's photos Helen Rider swims through the narrow confines of Taina Cave near Santo Domingo in the Dominican Republic. |