
; _2 P( j7 E l D# q, ^+ g, HOne of Martyn's diving companions, Robbie Schmittner, in a huge flooded cave in Mexico.
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+ H. K9 g+ ?1 |! FDivers 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.
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) f5 g8 `2 M2 A: X; N# a公仔箱論壇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 centigrade
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6 E1 o: w9 Y: ~$ V8 e# z: OIn another of Martyn's photos Helen Rider swims through the narrow confines of Taina Cave near Santo Domingo in the Dominican Republic. |