
4 Y) |4 M5 F3 BOne of Martyn's diving companions, Robbie Schmittner, in a huge flooded cave in Mexico.
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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.tvb now,tvbnow,bttvb f6 f; P' {0 b: E' N5 c/ D$ {
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8 g8 U+ y$ P2 s5 F3 C1 etvb now,tvbnow,bttvbDivers often use guide-lines to keep them on track in the murky depths. Getting lost can be fatal.5.39.217.77:88982 L) J" W7 i1 T% q2 v+ f
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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 centigradetvb now,tvbnow,bttvb5 ~( h+ V4 `3 `" G" I& }$ j
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( Q4 H( ]/ I, t$ ^公仔箱論壇In another of Martyn's photos Helen Rider swims through the narrow confines of Taina Cave near Santo Domingo in the Dominican Republic. |