Video: Diving into the Mayan Underworld

This video is a trailer for a much longer three-part documentary to come, but it gives us a great idea of what to expect. The film follows a team of divers – led by explorer Robbie Schmittner – who travel to the Yucatan Peninsula in Mexico in search of the world's largest cave. They discover an elaborate system of submerged caverns that the Mayans believed was a gateway to the underworld. They also find artifacts and remnants of that civilization that have been waiting to be discovered for hundreds of years. It looks like quite an adventure, and I'm already looking for the full series to hit at a later time.