California

Some of the most exciting tales of human determination and survival can be found in the chronicles of shipwrecks. Hold your breath and go below the watery surface to view some of the historic shipwrecks that scatter California's coastline, many of which have created heated controversy between archaeologists, championing the preservation of the wrecks, and salvagers, looking for treasure. As we tour the dark waters, we shed light on the tension between profit and preservation, ambition and greed.

• documentary