America's newest marine sanctuary, Papahanaumokuakea Marine National Monument, encompasses the Northwestern Hawaiian Islands. The monument is bigger than all U.S. national parks combined—yet the majority of this environment has never been seen. What is in this vast marine conservation area? And, what will it take to protect it?

National Geographic embarks on a month-long expedition to explore stunning coral reefs, shallow water environments, and rare species unique only to Hidden Hawaii.

Bonus feature: photo gallery.

Not available for shipment outside of the U.S. and Canada.

• 1 disc; 50 minutes
• Widescreen
• © 2009