National Geographic HD

Ten of history's worst maritime disasters at sea.

Explore the 10 most dramatic structural collapses in history, from bridges to buildings.

When a dam fails, catastrophe follows; history's 10 worst dam failures.

Paid programming.

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.

Meet the new Shark PowerDetect Upright Vacuum with features like DuoClean Detect Technology, self-cleaning brush roll and odor neutralizing and you will be cleaning faster, smarter and better!

Save thousands on car repairs.

See how one company is changing people's lives by helping them put their tax problems to rest.

Alaskans in remote areas must have self-reliance to survive.

In Port Protection, a new generation seeks wisdom from the old guard.

The villagers of Port Protection are back to paving with good intentions.

Curly shoots a bear; Troy and Sarah struggle with a new water system.

Residents tackle tasks at the height of summer's season of productivity.

All around Port Protection, neighbors lend each other helping hands.

Port Protection's canine community takes center stage.

Curly takes advantage of a break between storms to hunt for deer.

Curly's deer hunt comes to a thrilling end with a shot gone awry; Sam, Troy and Terry struggle with uneven ground to build Troy a bathroom.

Bear Grylls takes Rita Ora on an adventure in the Valley of Fire.

Bear Grylls and Troy Kotsur, an actor suffering from hearing impairment, embark on an expedition in the Scottish Highlands, navigating steep peaks and rough waters.

Bear sets challenges for Bradley Cooper in the canyons of the Wyoming Basin.

Bear Grylls and Benedict Cumberbatch adventure at the edge of the sea.

Bear and Cynthia Erivo survive a cold and rugged region of Wales.

In this enhanced episode, Sam and Matt embark on a father-son hunting excursion.

Port Protection residents help those in need as winter quickly approaches.