
2 z2 n( N8 D& h. K5 a. ntvb now,tvbnow,bttvbOne of Martyn's diving companions, Robbie Schmittner, in a huge flooded cave in Mexico.
# F5 Y% l4 U" v$ N公仔箱論壇7 E; w e- B1 @" B. d

) ~4 b, U, C6 ^4 ~0 E" `公仔箱論壇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.
4 {$ n/ {# y( M/ u3 ]2 M2 u5.39.217.77
8 I6 N; W# }* qtvb now,tvbnow,bttvb * t; D& K7 Q& Q. |
Divers often use guide-lines to keep them on track in the murky depths. Getting lost can be fatal.tvb now,tvbnow,bttvb1 Y" S! ~7 i. u. |) ^
5.39.217.77# m: Z8 {9 u4 m( k! ^

5 d; d8 O- r; l6 k. T. @8 q2 ~tvb now,tvbnow,bttvbDeep 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 centigradeTVBNOW 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。; A$ ~6 |, `4 Y: S& [/ ?5 E
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。( e: d( D6 c: x: f

8 e" s" m$ k# `, S2 s3 J& d) HIn another of Martyn's photos Helen Rider swims through the narrow confines of Taina Cave near Santo Domingo in the Dominican Republic. |