Cuba's enforced isolation has resulted in the unlikeliest of marine reserves: a huge, rambling archipelago known as Jardines de la Reina, or "Gardens of the Queen." Stretching around 140 miles along the southern coast of Cuba, it's one of the longest barrier reef systems in the world. Get an up-close look at Fidel Castro's diving playground, a forgotten ocean paradise unseen for half a century, and witness exotic species rarely seen elsewhere in the region. It's the lost jewel of the Caribbean, but how long can this pristine wilderness survive?

In the meeting place of two oceans in Indonesia's Lembeh Strait, photographers capture the majestic, otherworldly creatures living below the surface.

Patrolled by desperate gunmen looking to capture any vessel that strays into their path, the waters off East Africa are among the most dangerous in the world. With Somali pirates continuing to make headlines, this timely documentary tells the story of the US container ship Maersk Alabama, which was stormed by bandits in April 2009. With the captain taken hostage, the unarmed crew made the remarkable decision to confront the gun-toting invaders in a brave attempt to save their skipper and the ship. Now, using dramatic recreations and interviews with the crew and their families, this exclusive one-hour special reveals the incredible events that took place over those few days.