Black Pharaohs: Sunken Treasures

In a land of gold and ancient treasure, a recent discovery inside a pyramid sends archaeologists in search of clues about the glorious Nubian kingdom. But this isnt an average excavation this pyramid is flooded with water. For the first time ever, archaeologists dive inside underwater pyramid tombs to shed new light on the ancient Nubian kingdom who overthrew the pharaohs and ruled over all of Egypt for 75 years. (National Geographic)