Sunken Spanish galleons, East India Company sailboats, steamboats of California, Australian and Klondike gold mines... The imagination paints holds stuffed with gold and silver, precious stones and Chinese porcelain. How many treasures really rest on the bottom of the sea? How are the treasures of sunken ships sought and raised from the bottom in our time? What are the secrets of the most successful underwater explorers and treasure hunters? Another book in the series tells about this and much more. The book is addressed to a wide range of readers interested in underwater archeology, the history of the Great geographical discoveries and navigation in general.