National Geographic HD

Adolf Hitler's plans to dominate the oceans slowly unravel in a series of disastrous battles; now it is revealed how the Third Reich's mighty fleet finally sank beneath the waves.

Draining the ocean reveals a Basque galleon trading in whale oil; the Spanish empire relies on ships like this one to bring back valuable cargo; draining an Armada wreck off the coast of Ireland reveals a battle for control between Spain and England.

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.

As one of the most powerful cities on earth, the long historic story of London's meteoric rise is revealed.

Submerged shipwrecks and subterranean secrets reveal the story of New York City's rise.

Join your hosts Kevin Cash & Cory Cady as we discuss the 250th Anniversary of America with the official "America 250" logo on a Silver American Eagle label; we are locking in orders for this iconic release, but coins are limited! Don't miss out!

Regain independence and enjoy greater mobility with the compact design and long-lasting battery of portable oxygen.

Paid programming.

Paid programming.

Paid programming.

When it comes to Medicare coverage, there are a lot of options. Learn about your choices so that you can select the coverage that's right for you. Call to speak with a licensed Aetna agent today.

Unraveling the mysterious disappearance of the Mongol emperor.

A fresh investigation uncovers new clues behind Tutankhamun's mysterious death.

Probe into the death of a living god with clues from tablets and forensics.

Investigating whether Cleopatra died by cobra or political murder.

Grace O'Malley defies gender conventions of her day and becomes the most feared and respected leader of both the land and the sea, eventually rising to Chieftain.

Francis Drake is cemented in history as the world's most controversial pirate.

Blackbeard's name strikes fear into all as a brutal diabolical pirate.

Brilliant strategist Morgan takes humans, treasure, and towns without mercy.

Bartholomew Roberts is the most successful pirate of the Golden Age.

Captain Kidd, the treasure hunter, turns from pirate hunter to pirate.

Braver than the men, Anne Bonny and Mary Read are ferocious female pirates.

Englishman-turned-Algerian pirate John Ward becomes ruler of the Tunisian empire.

Discover how vampires crept into our nightmares and why they've stayed there.

We've been haunted—and hunted—by shapeshifting werewolves for millennia.

Grace O'Malley defies gender conventions of her day and becomes the most feared and respected leader of both the land and the sea, eventually rising to Chieftain.

Discover how vampires crept into our nightmares and why they've stayed there.