National Geographic HD (Pacific) Maritime archaeologists and historians search for the lost wrecks of the American Civil War. 2026-08-06 Using computer-generated imagery, the Cold War's lost nuclear weapons are revealed on ocean floors, along with evidence of secret nuclear confrontations. 2026-08-06 Maritime archaeologists and historians go in search of the biggest wrecks ever sunk beneath the seas; new scientific data combines with cutting-edge computer graphics to drain the oceans to investigate the world's most awe-inspiring wrecks. 2026-08-06 The plug is pulled on Scotland's famous lake to solve one of the world's greatest mysteries -- the identity of the Loch Ness monster. 2026-08-06 The secrets of how the Roman Empire controlled the seas of the Ancient world; revealing one of the oldest shipwrecks in the world; unearthing a port lost for centuries under Italian soil. 2026-08-06 A high-tech expedition searches for the iconic wrecks of the Battle of the Pacific, including the USS Lexington and the USS Indianapolis; funded by Microsoft co-founder Paul Allen, the expedition explains some of the greatest WWII mysteries. 2026-08-07