Watch Drain The Bermuda Triangle - --- ---- ---... Official

: It investigates deep undersea caves (blue holes) that may create powerful whirlpools capable of pulling in small vessels.

: The film reveals deep trenches, including the Puerto Rico Trench, and massive underwater mountains that could pose navigation hazards. Watch Drain the Bermuda Triangle - --- ---- ---...

: Using 3D multi-beam data, the team identifies unidentified undersea wrecks and debris fields, providing a clearer look at historical losses. Why Watch? : It investigates deep undersea caves (blue holes)

is a 2014 National Geographic documentary that uses advanced sonar technology and CGI to virtually "drain" the ocean, revealing the hidden geological landscape of the infamous 500,000-square-mile region. Where to Watch including the Puerto Rico Trench