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One of Martyn's diving companions, Robbie Schmittner, in a huge flooded cave in Mexico.
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, D3 Z: ]8 J! s. `7 Qos.tvboxnow.comDivers 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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, g- \1 p* W; M' N7 K3 n, N+ d+ R6 uos.tvboxnow.comDivers often use guide-lines to keep them on track in the murky depths. Getting lost can be fatal.
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o5 X1 O, P% q- t, b7 [os.tvboxnow.comDeep 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! h: p2 S/ t: e; I% u# A/ q
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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. |