Watching this documentary is like to be involved in a mysterious research project for 90 minutes. 
Diving to the depth of waters with skilful divers, working with archaeologists, who write the history with combining excavated parts date back to thousand years before our time. 
Historic monuments, a gigantic ship skinked in the Rome period, stories from mythologies, a legend, a tressure, an exhibition and OMG marvellous artworks.
What a great experience!
Thanks for the production.

A sentence from the talk in the movie is lingering on my mind:
“Unbelievable is a state in your mind”.