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One of Martyn's diving companions, Robbie Schmittner, in a huge flooded cave in Mexico. 9 I+ R2 x0 O# z }& ^
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7 t" J' i2 `6 l3 K5 U' W9 H! o% s5.39.217.76Divers 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.5.39.217.76; y6 v6 \7 C1 }- f4 ^
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Divers often use guide-lines to keep them on track in the murky depths. Getting lost can be fatal.
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+ v! ]7 H9 T, Ftvb now,tvbnow,bttvb 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。& L& Y. F( [( Q, n5 m& r/ @0 h# [: L
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 centigrade4 D2 j$ r f: Z2 d! D( J! \$ B" C& c
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! @( N3 T$ }+ A% N- ]( Utvb 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. |