From ancient shipwrecks to huge underwater rivers, the hidden world beneath the Black Sea is truly fascinating ... From a shipwrecking yard in Bangladesh to a river of iron dioxide in Canada ...

After a decade of hard work at a marine salvage company, the recently redundant submarine captain, Robinson, decides to risk everything in search of a fabled underwater treasure: a sunken Nazi U ...

The disaster could become "one of the largest man-made disasters in Black Sea waters," stated Paul ... the tanker was ...