Spectacular underwater scenes

Updated 8:30 AM ET, Fri September 9, 2011
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The Silfra fissure in Iceland's Thingvellier National Park is where the North American and Eurasian tectonic plates meet. Dive the North
The water is so clear many divers are said to lose all sense of depth and even experience vertigo. Dive the North
The mysterious underwater ruins of Yonaguni, Japan are estimated to be between 5,000 and 8,000 years old. OGATA Shin
Some claim the ruins to be evidence of a long lost city, while others are convinced it is a geological phenomenon. OGATA Shin
The submerged active volcano of Banua Wuhu in Indonesia seen releasing ribbons of silver bubbles of sulfur gas. Ocean Rover Cruises
The volcano's barren sulfur-covered rocks give way to coral reefs and an extraordinary display of marine life the deeper down you explore. Ocean Rover Cruises
The Museum of Underwater Modern Art in Cancun, Mexico, holds over 403 permanent life-size sculptures and is one of the largest artificial reef attractions in the world. Jason deCaires Taylor
The work of British sculptor Jason deCaires Taylor, each sculpture is individually cast and made using special cement mix to encourage coral growth. Jason deCaires Taylor
The Neptune Memorial Reef in Miami, Florida, is an artificial reef which doubles as a cemetery. Blue feature Neptune Memorial Reef
The first phase of the memorial has been built in the style of a "classical re-creation of the Lost City." Relatives of the deceased, scuba-divers and marine biologists are among those who dive among the statues of lions and coral-encrusted arches on the sea floor. Neptune Memorial Reef